[sched-deps] Remove needless check for modified_in_p when trying to fuse two non-conditional jump insns

	* sched-deps.c (sched_macro_fuse_insns): Do not check modified_in_p
	in the not conditional jump case.
	* doc/tm.texi (TARGET_SCHED_MACRO_FUSION_PAIR_P): Update description.
	* target.def (TARGET_SCHED_MACRO_FUSION_PAIR_P): Update description.

	* gcc.target/aarch64/fuse_adrp_add_1.c: New test.

From-SVN: r218012