When make with EXTRA_CFLAGS=-W, it will report error.
  so give a check in Makefile.

Signed-off-by: Chen Gang <gang.c...@asianux.com>
Signed-off-by: Vladimir Kondratiev <qca_vkond...@qca.qualcomm.com>
---
 drivers/gpu/drm/omapdrm/Makefile |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/Makefile b/drivers/gpu/drm/omapdrm/Makefile
index d85e058..8beaf05 100644
--- a/drivers/gpu/drm/omapdrm/Makefile
+++ b/drivers/gpu/drm/omapdrm/Makefile
@@ -3,7 +3,10 @@
 # Direct Rendering Infrastructure (DRI)
 #
 
-ccflags-y := -Iinclude/drm -Werror
+ccflags-y := -Iinclude/drm 
+ifeq (, $(findstring -W,$(EXTRA_CFLAGS)))
+       ccflags-y += -Werror
+endif
 omapdrm-y := omap_drv.o \
        omap_irq.o \
        omap_debugfs.o \
-- 
1.7.7.6
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