Use register numbers instead of register names

Avoid ambiguity by using register numbers. Register names are
interpreted depending on the ABI. Fixes the issue with mips64 gcc,
where registers t0-t4 are translated into $8-$11 (o32 ABI) instead
of $12-$15 (o64 ABI).

Also, use t9 ($25) for storing function address
(in getProcAddress.cpp).

Change-Id: I12ef5cd98bf14dab3c01f2756889cc02856c1cd8
diff --git a/opengl/libs/EGL/getProcAddress.cpp b/opengl/libs/EGL/getProcAddress.cpp
index 25cffae..2b2b227 100644
--- a/opengl/libs/EGL/getProcAddress.cpp
+++ b/opengl/libs/EGL/getProcAddress.cpp
@@ -125,9 +125,9 @@
         #define API_ENTRY(_api) __attribute__((noinline)) _api
 
         #define CALL_GL_EXTENSION_API(_api, ...)                    \
-            register unsigned int _t0 asm("t0");                    \
-            register unsigned int _fn asm("t1");                    \
-            register unsigned int _tls asm("v1");                   \
+            register unsigned int _t0 asm("$12");                   \
+            register unsigned int _fn asm("$25");                   \
+            register unsigned int _tls asm("$3");                   \
             asm volatile(                                           \
                 ".set  push\n\t"                                    \
                 ".set  noreorder\n\t"                               \
@@ -157,9 +157,9 @@
         #define API_ENTRY(_api) __attribute__((noinline)) _api
 
         #define CALL_GL_EXTENSION_API(_api, ...)                    \
-            register unsigned int _t0 asm("t0");                    \
-            register unsigned int _fn asm("t1");                    \
-            register unsigned int _tls asm("v1");                   \
+            register unsigned int _t0 asm("$8");                    \
+            register unsigned int _fn asm("$25");                    \
+            register unsigned int _tls asm("$3");                   \
             asm volatile(                                           \
                 ".set  push\n\t"                                    \
                 ".set  noreorder\n\t"                               \