loader: use HAVE_LIBDRM instead of ! __NOT_HAVE_DRM_H

Double negatives in English language are normally avoided, plus the
former seems cleaner and more consistent.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

src/loader/Android.mk

 LOCAL_SRC_FILES := \
 	$(LOADER_C_FILES)
 
-# swrast only
-ifeq ($(MESA_GPU_DRIVERS),swrast)
-LOCAL_CFLAGS += -D__NOT_HAVE_DRM_H
-else
+ifneq ($(filter-out swrast,$(MESA_GPU_DRIVERS)),)
+LOCAL_CFLAGS += -DHAVE_LIBDRM
 LOCAL_SHARED_LIBRARIES := libdrm
 endif
 

src/loader/Makefile.am

 
 endif
 
-if !HAVE_LIBDRM
-libloader_la_CPPFLAGS += \
-	-D__NOT_HAVE_DRM_H
-else
+if HAVE_LIBDRM
 libloader_la_CPPFLAGS += \
 	$(LIBDRM_CFLAGS)
 

src/loader/SConscript

     '#include'
 ])
 
-env.Append(CPPDEFINES = ['__NOT_HAVE_DRM_H'])
-
 if env['udev']:
     env.PkgUseModules('UDEV')
     env.Append(CPPDEFINES = ['HAVE_LIBUDEV'])

src/loader/loader.c

 #endif
 #include "loader.h"
 
-#ifndef __NOT_HAVE_DRM_H
+#ifdef HAVE_LIBDRM
 #include <xf86drm.h>
 #endif
 
 }
 #endif
 
-#if !defined(__NOT_HAVE_DRM_H)
+#if defined(HAVE_LIBDRM)
 /* for i915 */
 #include <i915_drm.h>
 /* for radeon */
    if (sysfs_get_pci_id_for_fd(fd, vendor_id, chip_id))
       return 1;
 #endif
-#if !defined(__NOT_HAVE_DRM_H)
+#if HAVE_LIBDRM
    if (drm_get_pci_id_for_fd(fd, vendor_id, chip_id))
       return 1;
 #endif
 
    if (!loader_get_pci_id_for_fd(fd, &vendor_id, &chip_id)) {
 
-#ifndef __NOT_HAVE_DRM_H
+#if HAVE_LIBDRM
       /* fallback to drmGetVersion(): */
       drmVersionPtr version = drmGetVersion(fd);
 

src/loader/pci_id_driver_map.c

 
 int is_nouveau_vieux(int fd);
 
-#ifndef __NOT_HAVE_DRM_H
+#ifdef HAVE_LIBDRM
 
 #include <xf86drm.h>
 #include <nouveau_drm.h>