get rid of HAL pixelformats 5551 and 4444

This changes removes the use of 5551 and 4444 pixel formats
as its not supported anymore

Change-Id: I817510c3c7c0c3d95924c2ffc79e5727a6d6c48f
(cherry picked from commit 1fbd4a9662b07d53a3f220c91b3e85ca571a4938)
diff --git a/libcopybit/copybit.cpp b/libcopybit/copybit.cpp
index 3b7039c..ff7dc4e 100644
--- a/libcopybit/copybit.cpp
+++ b/libcopybit/copybit.cpp
@@ -441,8 +441,6 @@
                 // we don't support plane alpha with RGBA formats
                 case HAL_PIXEL_FORMAT_RGBA_8888:
                 case HAL_PIXEL_FORMAT_BGRA_8888:
-                case HAL_PIXEL_FORMAT_RGBA_5551:
-                case HAL_PIXEL_FORMAT_RGBA_4444:
                     ALOGE ("%s : Unsupported Pixel format %d", __FUNCTION__,
                            src->format);
                     return -EINVAL;
diff --git a/libcopybit/copybit.h b/libcopybit/copybit.h
index 878eca4..13d78b5 100644
--- a/libcopybit/copybit.h
+++ b/libcopybit/copybit.h
@@ -48,8 +48,6 @@
     COPYBIT_FORMAT_RGB_888      = HAL_PIXEL_FORMAT_RGB_888,
     COPYBIT_FORMAT_RGB_565      = HAL_PIXEL_FORMAT_RGB_565,
     COPYBIT_FORMAT_BGRA_8888    = HAL_PIXEL_FORMAT_BGRA_8888,
-    COPYBIT_FORMAT_RGBA_5551    = HAL_PIXEL_FORMAT_RGBA_5551,
-    COPYBIT_FORMAT_RGBA_4444    = HAL_PIXEL_FORMAT_RGBA_4444,
     COPYBIT_FORMAT_YCbCr_422_SP = 0x10,
     COPYBIT_FORMAT_YCrCb_420_SP = 0x11,
 };
diff --git a/libcopybit/copybit_c2d.cpp b/libcopybit/copybit_c2d.cpp
index 385acb0..914bed7 100644
--- a/libcopybit/copybit_c2d.cpp
+++ b/libcopybit/copybit_c2d.cpp
@@ -265,8 +265,6 @@
         case HAL_PIXEL_FORMAT_RGBA_8888:      return C2D_COLOR_FORMAT_8888_ARGB |
                                               C2D_FORMAT_SWAP_RB;
         case HAL_PIXEL_FORMAT_BGRA_8888:      return C2D_COLOR_FORMAT_8888_ARGB;
-        case HAL_PIXEL_FORMAT_RGBA_5551:      return C2D_COLOR_FORMAT_5551_RGBA;
-        case HAL_PIXEL_FORMAT_RGBA_4444:      return C2D_COLOR_FORMAT_4444_RGBA;
         case HAL_PIXEL_FORMAT_YCbCr_420_SP:   return C2D_COLOR_FORMAT_420_NV12;
         case HAL_PIXEL_FORMAT_NV12_ENCODEABLE:return C2D_COLOR_FORMAT_420_NV12;
         case HAL_PIXEL_FORMAT_YCrCb_420_SP:   return C2D_COLOR_FORMAT_420_NV21;
@@ -400,9 +398,7 @@
         case HAL_PIXEL_FORMAT_RGBA_8888:
         case HAL_PIXEL_FORMAT_RGBX_8888:
         case HAL_PIXEL_FORMAT_RGB_565:
-        case HAL_PIXEL_FORMAT_BGRA_8888:
-        case HAL_PIXEL_FORMAT_RGBA_5551:
-        case HAL_PIXEL_FORMAT_RGBA_4444: {
+        case HAL_PIXEL_FORMAT_BGRA_8888: {
             return COPYBIT_SUCCESS;
         }
         default: