Handle __mips64

Handle __mips64 to avoid a build failure since
https://sourceforge.net/p/gnu-efi/code/ci/b1c7a1c5f2685562f06fac25c24618d0af5ca1cb

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>

inc/efi.h

@@ -48,7 +48,7 @@ Revision History
 #include "aarch64/efibind.h"
 #elif defined (_M_ARM) || defined(__arm__)
 #include "arm/efibind.h"
-#elif defined (_M_MIPS64) || defined(__mips64__)
+#elif defined (_M_MIPS64) || defined(__mips64__) || defined(__mips64)
 #include "mips64el/efibind.h"
 #elif defined (__riscv) && __riscv_xlen == 64
 #include "riscv64/efibind.h"

inc/efilib.h

@@ -31,7 +31,7 @@ Revision History
 #include "aarch64/efilibplat.h"
 #elif defined (_M_ARM) || defined(__arm__)
 #include "arm/efilibplat.h"
-#elif defined (_M_MIPS64) || defined(__mips64__)
+#elif defined (_M_MIPS64) || defined(__mips64__) || defined(__mips64)
 #include "mips64el/efilibplat.h"
 #elif defined (__riscv) && __riscv_xlen == 64
 #include "riscv64/efilibplat.h"

inc/efirtlib.h

@@ -30,7 +30,7 @@ Revision History
 #include "aarch64/efilibplat.h"
 #elif defined (_M_ARM) || defined(__arm__)
 #include "arm/efilibplat.h"
-#elif defined (_M_MIPS64) || defined(__mips64__)
+#elif defined (_M_MIPS64) || defined(__mips64__) || defined(__mips64)
 #include "mips64el/efilibplat.h"
 #elif defined (__riscv) && __riscv_xlen == 64
 #include "riscv64/efilibplat.h"