[PATCH] aarch64: Fix PR97638

[PATCH] aarch64: Fix PR97638

Currently the testcase in the patch was failing to produce
a 'bti c' at the beginning of the function. This was because
in aarch64_pac_insn_p, we were wrongly returning at the first
check!

2020-10-30  Sudakshina Das  <sudi.das@arm.com>

gcc/ChangeLog:

	PR target/97638
	* config/aarch64/aarch64-bti-insert.c (aarch64_pac_insn_p): Update
	return value on INSN_P check.

gcc/testsuite/ChangeLog:

	PR target/97638
	* gcc.target/aarch64/pr97638.c: New test.a