tests/npcm7xx_adc: Clean up global variable shadowing

tests/npcm7xx_adc: Clean up global variable shadowing

Rename the global 'adc' variable in order to avoid:

  tests/qtest/npcm7xx_adc-test.c:98:58: error: declaration shadows a variable in the global scope [-Werror,-Wshadow]
  static uint32_t adc_read_con(QTestState *qts, const ADC *adc)
                                                           ^
  tests/qtest/npcm7xx_adc-test.c:103:55: error: declaration shadows a variable in the global scope [-Werror,-Wshadow]
  static void adc_write_con(QTestState *qts, const ADC *adc, uint32_t value)
                                                        ^
  tests/qtest/npcm7xx_adc-test.c:108:59: error: declaration shadows a variable in the global scope [-Werror,-Wshadow]
  static uint32_t adc_read_data(QTestState *qts, const ADC *adc)
                                                            ^
  tests/qtest/npcm7xx_adc-test.c:119:53: error: declaration shadows a variable in the global scope [-Werror,-Wshadow]
  static void adc_qom_set(QTestState *qts, const ADC *adc,
                                                      ^
  tests/qtest/npcm7xx_adc-test.c:135:57: error: declaration shadows a variable in the global scope [-Werror,-Wshadow]
  static void adc_write_input(QTestState *qts, const ADC *adc,
                                                          ^
  tests/qtest/npcm7xx_adc-test.c:144:56: error: declaration shadows a variable in the global scope [-Werror,-Wshadow]
  static void adc_write_vref(QTestState *qts, const ADC *adc, uint32_t value)
                                                         ^
  tests/qtest/npcm7xx_adc-test.c:162:59: error: declaration shadows a variable in the global scope [-Werror,-Wshadow]
  static uint32_t adc_prescaler(QTestState *qts, const ADC *adc)
                                                            ^
  tests/qtest/npcm7xx_adc-test.c:175:64: error: declaration shadows a variable in the global scope [-Werror,-Wshadow]
  static void adc_wait_conv_finished(QTestState *qts, const ADC *adc,
                                                                 ^
  tests/qtest/npcm7xx_adc-test.c:196:16: error: declaration shadows a variable in the global scope [-Werror,-Wshadow]
    const ADC *adc = adc_p;
               ^
  tests/qtest/npcm7xx_adc-test.c:207:16: error: declaration shadows a variable in the global scope [-Werror,-Wshadow]
    const ADC *adc = adc_p;
               ^
  tests/qtest/npcm7xx_adc-test.c:235:16: error: declaration shadows a variable in the global scope [-Werror,-Wshadow]
    const ADC *adc = adc_p;
               ^
  tests/qtest/npcm7xx_adc-test.c:267:16: error: declaration shadows a variable in the global scope [-Werror,-Wshadow]
    const ADC *adc = adc_p;
               ^
  tests/qtest/npcm7xx_adc-test.c:293:16: error: declaration shadows a variable in the global scope [-Werror,-Wshadow]
    const ADC *adc = adc_p;
               ^
  tests/qtest/npcm7xx_adc-test.c:311:16: error: declaration shadows a variable in the global scope [-Werror,-Wshadow]
    const ADC *adc = adc_p;
               ^
  tests/qtest/npcm7xx_adc-test.c:93:5: note: previous declaration is here
  ADC adc = {
      ^

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-ID: <20231009100251.56019-8-philmd@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>