arm: Zero/Sign extends for CMSE security

arm: Zero/Sign extends for CMSE security

Co-Authored by: Andre Simoes Dias Vieira <Andre.SimoesDiasVieira@arm.com>

This patch makes the following changes:

1) When calling a secure function from non-secure code then any arguments
   smaller than 32-bits that are passed in registers are zero- or sign-extended.
2) After a non-secure function returns into secure code then any return value
   smaller than 32-bits that is passed in a register is  zero- or sign-extended.

This patch addresses the following CVE-2024-0151.

gcc/ChangeLog:
	PR target/114837
	* config/arm/arm.cc (cmse_nonsecure_call_inline_register_clear):
	Add zero/sign extend.
	(arm_expand_prologue): Add zero/sign extend.

gcc/testsuite/ChangeLog:

	* gcc.target/arm/cmse/extend-param.c: New test.
	* gcc.target/arm/cmse/extend-return.c: New test.