arc: Update legitimate small data address.

arc: Update legitimate small data address.

All ARC's small data adressing is using address scaling feature of the
load/store instructions (i.e., the address is made of a general
pointer plus a shifted offset. The shift amount depends on the
addressing mode).  This patch is checking the offset of an address if
it fits the scalled constraint.  If so, a small data access is
generated.  This patch fixes execute' pr93249 failure.

gcc/
xxxx-xx-xx  Claudiu Zissulescu  <claziss@synopsys.com>

	* config/arc/arc.c (leigitimate_small_data_address_p): Check if an
	address has an offset which fits the scalling constraint for a
	load/store operation.
	(legitimate_scaled_address_p): Update use
	leigitimate_small_data_address_p.
	(arc_print_operand): Likewise.
	(arc_legitimate_address_p): Likewise.
	(legitimate_small_data_address_p): Likewise.

Signed-off-by: Claudiu Zissulescu <claziss@gmail.com>