hw/intc/arm_gicv3_its: Remove redundant ITS_CTLR_ENABLED define
We currently define a bitmask for the GITS_CTLR ENABLED bit in
two ways: as ITS_CTLR_ENABLED, and via the FIELD() macro as
R_GITS_CTLR_ENABLED_MASK. Consistently use the FIELD macro version
everywhere and remove the redundant ITS_CTLR_ENABLED define.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>