aarch64: Fix SYMBOL_TINY_GOT handling for ILP32 [PR94201]

aarch64: Fix SYMBOL_TINY_GOT handling for ILP32 [PR94201]

The SYMBOL_TINY_GOT case in aarch64_load_symref_appropriately was
missing support for ILP32.  This caused an ICE on the testcase.

2020-03-18  Duan bo  <duanbo3@huawei.com>

gcc/
	PR target/94201
	* config/aarch64/aarch64.md (ldr_got_tiny): Delete.
	(@ldr_got_tiny_<mode>): New pattern.
	(ldr_got_tiny_sidi): Likewise.
	* config/aarch64/aarch64.c (aarch64_load_symref_appropriately): Use
	them to handle SYMBOL_TINY_GOT for ILP32.

gcc/testsuite/
	PR target/94201
	* gcc.target/aarch64/pr94201.c：New test.