x86/sgx: Fix a typo in the kernel-doc comment for enum sgx_attribute

Use the exact enum name when documenting "enum sgx_attribute" to fix a
warning if the file is fed into kernel-doc processing:

  WARNING: ./arch/x86/include/asm/sgx.h:139 expecting prototype for enum
           sgx_attributes. Prototype was for enum sgx_attribute instead

Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Kai Huang <kai.huang@intel.com>
Link: https://patch.msgid.link/20251112160708.1343355-6-seanjc%40google.com

Author: sean-jc

arch/x86/include/asm/sgx.h

@@ -112,7 +112,7 @@ enum sgx_miscselect {
 #define SGX_SSA_MISC_EXINFO_SIZE	16
 
 /**
- * enum sgx_attributes - the attributes field in &struct sgx_secs
+ * enum sgx_attribute - the attributes field in &struct sgx_secs
  * @SGX_ATTR_INIT:		Enclave can be entered (is initialized).
  * @SGX_ATTR_DEBUG:		Allow ENCLS(EDBGRD) and ENCLS(EDBGWR).
  * @SGX_ATTR_MODE64BIT:		Tell that this a 64-bit enclave.