gralloc: Update gralloc source to e219158a67fbfbedbac9

This patch updates the gralloc source to:
   Subject: Add support for hikey
   Sha1:    e219158a67fbfbedbac99e15809b948313aeb5fa

From Xinliang's tree here:
https://github.com/xin3liang/gralloc-mali.git

Also inlcudes minor whitespace/style fixes and corrected
LOCK_STATE_READ_MASK value, noticed in review on Gerrit.

These changes are needed to support the r6p0 version of
the binary mali graphics libraries.

Change-Id: Ia33671447b36fd83da544af6da8ec6ce48e80b05
Signed-off-by: John Stultz <john.stultz@linaro.org>
diff --git a/gralloc/gralloc_priv.h b/gralloc/gralloc_priv.h
index 7b33ae2..5797725 100644
--- a/gralloc/gralloc_priv.h
+++ b/gralloc/gralloc_priv.h
@@ -147,7 +147,8 @@
 	{
 		LOCK_STATE_WRITE     =   1 << 31,
 		LOCK_STATE_MAPPED    =   1 << 30,
-		LOCK_STATE_READ_MASK =   0x3FFFFFFF
+		LOCK_STATE_UNREGISTERED  =   1 << 29,
+		LOCK_STATE_READ_MASK =   0x1FFFFFFF
 	};
 
 	// ints