intel: Do not use libpciaccess on Android

This patch makes the code not rely anymore on libpciaccess when compiled
for Android to eliminate ioperm() and iopl() syscalls required by that
library. As a side effect, the mappable aperture size is hardcoded to 64
MiB on Android, however nothing seems to rely on this value anyway, as
checked be grepping relevant code in drm_gralloc and Mesa.

Cc: Rob Herring <rob.herring@linaro.org>
Signed-off-by: Tomasz Figa <tfiga@google.com>
[Emil Velikov: rebase against master. add missing __func__, Eric]
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Acked-by: John Stultz <john.stultz@linaro.org>

intel/Android.mk

@@ -33,8 +33,7 @@ LOCAL_MODULE := libdrm_intel
 LOCAL_SRC_FILES := $(LIBDRM_INTEL_FILES)
 
 LOCAL_SHARED_LIBRARIES := \
-	libdrm \
-	libpciaccess
+	libdrm
 
 include $(LIBDRM_COMMON_MK)
 include $(BUILD_SHARED_LIBRARY)

intel/intel_bufmgr.c

@@ -32,7 +32,9 @@
 #include <errno.h>
 #include <drm.h>
 #include <i915_drm.h>
+#ifndef __ANDROID__
 #include <pciaccess.h>
+#endif
 #include "libdrm_macros.h"
 #include "intel_bufmgr.h"
 #include "intel_bufmgr_priv.h"
@@ -322,6 +324,7 @@ drm_intel_get_pipe_from_crtc_id(drm_intel_bufmgr *bufmgr, int crtc_id)
 	return -1;
 }
 
+#ifndef __ANDROID__
 static size_t
 drm_intel_probe_agp_aperture_size(int fd)
 {
@@ -347,6 +350,15 @@ err:
 	pci_system_cleanup ();
 	return size;
 }
+#else
+static size_t
+drm_intel_probe_agp_aperture_size(int fd)
+{
+	/* Nothing seems to rely on this value on Android anyway... */
+	fprintf(stderr, "%s: Mappable aperture size hardcoded to 64MiB\n", __func__);
+	return 64 * 1024 * 1024;
+}
+#endif
 
 int
 drm_intel_get_aperture_sizes(int fd, size_t *mappable, size_t *total)