gallium: replace INLINE with inline

Generated by running:
git grep -l INLINE src/gallium/ | xargs sed -i 's/\bINLINE\b/inline/g'
git grep -l INLINE src/mesa/state_tracker/ | xargs sed -i 's/\bINLINE\b/inline/g'
git checkout src/gallium/state_trackers/clover/Doxyfile

and manual edits to
src/gallium/include/pipe/p_compiler.h
src/gallium/README.portability

to remove mentions of the inline define.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Acked-by: Marek Olšák <marek.olsak@amd.com>
diff --git a/src/gallium/state_trackers/xvmc/xvmc_private.h b/src/gallium/state_trackers/xvmc/xvmc_private.h
index 84c7b6c..a1d026f 100644
--- a/src/gallium/state_trackers/xvmc/xvmc_private.h
+++ b/src/gallium/state_trackers/xvmc/xvmc_private.h
@@ -106,7 +106,7 @@
 #define XVMC_WARN  2
 #define XVMC_TRACE 3
 
-static INLINE void XVMC_MSG(int level, const char *fmt, ...)
+static inline void XVMC_MSG(int level, const char *fmt, ...)
 {
    static int debug_level = -1;