aarch64: Fix whitespace in ls64 builtin implementation [PR110100]

The ls64 builtin code was using incorrect GNU style with eight spaces where
there should be a tab. Fixed thusly.

gcc/ChangeLog:

	PR target/110100
	* config/aarch64/aarch64-builtins.cc (aarch64_init_ls64_builtins_types):
	Replace eight consecutive spaces with tabs.
	(aarch64_init_ls64_builtins): Likewise.
	(aarch64_expand_builtin_ls64): Likewise.
	* config/aarch64/aarch64.md (ld64b): Likewise.
	(st64b): Likewise.
	(st64bv): Likewise
	(st64bv0): Likewise.

(cherry picked from commit 71361354)