[PR97701] LRA: Don't narrow class only for REG or MEM.

[PR97701] LRA: Don't narrow class only for REG or MEM.

Reload pseudos of ALL_REGS class did not narrow class from constraint
in insn (set (pseudo) (lo_sum ...)) because lo_sum is considered an
object (OBJECT_P) although the insn is not a classic move.  To permit
narrowing we are starting to use MEM_P and REG_P instead of OBJECT_P.

gcc/ChangeLog:

	PR target/97701
	* lra-constraints.c (in_class_p): Don't narrow class only for REG
	or MEM.

gcc/testsuite/ChangeLog:

	PR target/97701
	* gcc.target/aarch64/pr97701.c: New.