intel: Rename files with gen_ prefix in common code to intel_

Changes in this patch include:
- Rename all files in src/intel/common path
- Update the filenames used in source and build files

Signed-off-by: Anuj Phogat <anuj.phogat@gmail.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9413>

src/intel/vulkan/genX_cmd_buffer.c

@@ -30,8 +30,8 @@
 #include "vk_util.h"
 #include "util/fast_idiv_by_const.h"
 
-#include "common/gen_aux_map.h"
-#include "common/gen_l3_config.h"
+#include "common/intel_aux_map.h"
+#include "common/intel_l3_config.h"
 #include "genxml/gen_macros.h"
 #include "genxml/genX_pack.h"