glapi: fix typo in count_scale

 2*4=8

Signed-off-by: Gregory Hainaut <gregory.hainaut@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
(cherry picked from commit 2ab5eccf5de4a68d0d8d2668f6c5244cc6a41846)
diff --git a/src/mapi/glapi/gen/gl_API.xml b/src/mapi/glapi/gen/gl_API.xml
index 6e00363..861df7f 100644
--- a/src/mapi/glapi/gen/gl_API.xml
+++ b/src/mapi/glapi/gen/gl_API.xml
@@ -5858,7 +5858,7 @@
         <param name="location" type="GLint"/>
         <param name="count" type="GLsizei" counter="true"/>
         <param name="transpose" type="GLboolean"/>
-        <param name="value" type="const GLfloat *" count="count" count_scale="6"/>
+        <param name="value" type="const GLfloat *" count="count" count_scale="8"/>
         <glx ignore="true"/>
     </function>
     <function name="UniformMatrix4x2fv" es2="3.0">