gralloc: Add support for 8-bit RAW MIPI stream

Define new HAL color format for RAW-8 stream and
add support for buffer allocation with RAW-8 format.

Change-Id: I1ee1dbd270d25c27e52c5dd023345c8283c658d2
diff --git a/libgralloc/alloc_controller.cpp b/libgralloc/alloc_controller.cpp
index 805948b..5d80e6d 100644
--- a/libgralloc/alloc_controller.cpp
+++ b/libgralloc/alloc_controller.cpp
@@ -248,6 +248,9 @@
             case HAL_PIXEL_FORMAT_RAW10:
                 aligned_w = ALIGN(width * 10 / 8, 8);
                 break;
+            case HAL_PIXEL_FORMAT_RAW8:
+                aligned_w = ALIGN(width, 8);
+                break;
             case HAL_PIXEL_FORMAT_YCbCr_420_SP_TILED:
                 aligned_w = ALIGN(width, 128);
                 break;
@@ -556,7 +559,9 @@
         case HAL_PIXEL_FORMAT_RAW10:
             size = ALIGN(alignedw * alignedh, 4096);
             break;
-
+        case HAL_PIXEL_FORMAT_RAW8:
+            size = alignedw * alignedh;
+            break;
             // adreno formats
         case HAL_PIXEL_FORMAT_YCrCb_420_SP_ADRENO:  // NV21
             size  = ALIGN(alignedw*alignedh, 4096);
@@ -794,6 +799,7 @@
         case HAL_PIXEL_FORMAT_NV21_ZSL:
         case HAL_PIXEL_FORMAT_RAW16:
         case HAL_PIXEL_FORMAT_RAW10:
+        case HAL_PIXEL_FORMAT_RAW8:
             getYuvSPPlaneInfo(hnd->base, width, height, 1, ycbcr);
             std::swap(ycbcr->cb, ycbcr->cr);
         break;