testsuite: [arm] Relax expected register names in MVE tests

testsuite: [arm] Relax expected register names in MVE tests

These two tests have hardcoded q0 as destination/source of load/store
instructions, but this register is actually used only under
-mfloat-abi=hard. When using -mfloat-abi=softfp, other registers
(eg. q3) can be used to transfer function arguments from core
registers to MVE registers, making the expected regexp fail.

This small patch replaces q0 with q[0-7] to accept any 'q' register.
In several places where we had q[0-9]+, replace it with q[0-7] as MVE
only has q0-q7 registers.

OK for trunk?

gcc/testsuite/ChangeLog:

	* gcc.target/arm/mve/mve_load_memory_modes.c: Update expected
	registers.
	* gcc.target/arm/mve/mve_store_memory_modes.c: Likewise.