drm: Fix drm.h uapi header for Windows

This will allow Mesa to port code to Windows more easily.

Hide BSD header and drm_handle_t behind _WIN32 check.

Change __volatile__ to volatile, which is standard.

Signed-off-by: James Park <jpark37@lagfreegames.com>

include/uapi/drm/drm.h

@@ -48,10 +48,9 @@ typedef unsigned int drm_handle_t;
 #include <asm/ioctl.h>
 typedef unsigned int drm_handle_t;
 
-#else /* One of the BSDs */
+#else
 
 #include <stdint.h>
-#include <sys/ioccom.h>
 #include <sys/types.h>
 typedef int8_t   __s8;
 typedef uint8_t  __u8;
@@ -62,10 +61,16 @@ typedef uint32_t __u32;
 typedef int64_t  __s64;
 typedef uint64_t __u64;
 typedef size_t   __kernel_size_t;
+
+#ifndef _WIN32 /* One of the BSDs */
+
+#include <sys/ioccom.h>
 typedef unsigned long drm_handle_t;
 
 #endif
 
+#endif
+
 #if defined(__cplusplus)
 extern "C" {
 #endif
@@ -128,7 +133,7 @@ struct drm_tex_region {
  * other data stored in the same cache line.
  */
 struct drm_hw_lock {
-	__volatile__ unsigned int lock;		/**< lock variable */
+	volatile unsigned int lock;		/**< lock variable */
 	char padding[60];			/**< Pad to cache line */
 };