selftests/sgx: Fix corrupted cpuid macro invocation

The SGX selftest fails to build on tip/x86/sgx:

	main.c: In function ‘get_total_epc_mem’:
	main.c:296:17: error: implicit declaration of function ‘__cpuid’ [-Werror=implicit-function-declaration]
	  296 |                 __cpuid(&eax, &ebx, &ecx, &edx);
	      |                 ^~~~~~~

Include cpuid.h and use __cpuid_count() macro in order to fix the
compilation issue.

[ dhansen: tweak commit message ]

Fixes: f0ff2447b861 ("selftests/sgx: Add a new kselftest: Unclobbered_vdso_oversubscribed")
Signed-off-by: Jarkko Sakkinen <[email protected]>
Signed-off-by: Dave Hansen <[email protected]>
Acked-by: Reinette Chatre <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Cc: Shuah Khan <[email protected]>

0 files changed, 0 insertions, 0 deletions