aarch64: Handle autoinc addresses in ld1rq splitter [PR112906]

This patch uses the new force_reload_address routine added by the
previous patch to fix PR112906.

gcc/ChangeLog:

	PR target/112906
	* config/aarch64/aarch64-sve.md (@aarch64_vec_duplicate_vq<mode>_le):
	Use force_reload_address to reload addresses that aren't suitable for
	ld1rq in the pre-RA splitter.

gcc/testsuite/ChangeLog:

	PR target/112906
	* gcc.target/aarch64/sve/acle/general/pr112906.c: New test.