aarch64: Adjust some testcases for ilp32 option conflict [PR94712]

Since -mabi=ilp32 option is not compatible with large code model, Require
lp64 target for the following tests:
gcc.target/aarch64/pr63304_1.c
gcc.target/aarch64/pr70120-2.c
gcc.target/aarch64/pr94530.c
gcc.target/aarch64/reload-valid-spoff.c

2020-04-22  Duan bo  <duanbo3@huawei.com>

gcc/testsuite/
	PR testsuite/94712
	* gcc.target/aarch64/pr63304_1.c: Require lp64 target.
	* gcc.target/aarch64/pr70120-2.c: Likewise.
	* gcc.target/aarch64/pr94530.c: Likewise.
	* gcc.target/aarch64/reload-valid-spoff.c: Likewise.

gcc/testsuite/ChangeLog

+2020-04-22  Duan bo  <duanbo3@huawei.com>
+
+	PR testsuite/94712
+	* gcc.target/aarch64/pr63304_1.c: Require lp64 target.
+	* gcc.target/aarch64/pr70120-2.c: Likewise.
+	* gcc.target/aarch64/pr94530.c: Likewise.
+	* gcc.target/aarch64/reload-valid-spoff.c: Likewise.
+
 2020-04-22  Felix Yang  <felix.yang@huawei.com>
 
 	PR target/94678

gcc/testsuite/gcc.target/aarch64/pr63304_1.c

 /* { dg-do assemble } */
+/* { dg-require-effective-target lp64 } */
 /* { dg-options "-O1 --save-temps" } */
 #pragma GCC push_options
 #pragma GCC target ("+nothing+simd,cmodel=small")

gcc/testsuite/gcc.target/aarch64/pr70120-2.c

 /* { dg-do compile } */
+/* { dg-require-effective-target lp64 } */
 /* { dg-options "-Og -freorder-functions -g3 -mcmodel=large" } */
 
 typedef short v32u16 __attribute__ ((vector_size (32)));

gcc/testsuite/gcc.target/aarch64/pr94530.c

 /* { dg-do compile } */
+/* { dg-require-effective-target lp64 } */
 /* { dg-options "-Os -mcpu=falkor -mpc-relative-literal-loads -mcmodel=large" } */
 
 extern void bar(const char *);

gcc/testsuite/gcc.target/aarch64/reload-valid-spoff.c

 /* { dg-do compile } */
+/* { dg-require-effective-target lp64 } */
 /* { dg-options "-O2 -mcmodel=large -fno-builtin" }  */
 /* { dg-skip-if "-mcmodel=large -fPIC not currently supported" { aarch64-*-* }  { "-fPIC" } { "" } } */