sony-coconut: Added 16-bit color depth workaround (!178)

Signed-off-by: Claudio Maggioni (maggicl) <cmaggioni@keemail.me>

[skip ci]: already build successfully in CI

device/linux-sony-coconut/APKBUILD

@@ -2,7 +2,7 @@
 
 pkgname="linux-sony-coconut"
 pkgver=3.4.0
-pkgrel=3
+pkgrel=4
 pkgdesc="Live with Walkman kernel fork"
 arch="armhf"
 _carch="arm"
@@ -81,7 +81,7 @@ package() {
 }
 
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-322d5545c57f86534d72bc69c5c0c9973d8ef7db801e850bb07b8b1e66e52ddfe007b5b9e01c5ae107958a497908ed56b2c3b41d3e95f11297196062256062e5  config-sony-coconut.armhf
+be06843500bb47d386ff1b69e6b17de0b4c67dbd6047f313405ff470ca4fe2edd45ad7bdf2a42235ac4c4b2a4776fa8e6258d29e36bf0d6e0e462fdb0ec73f9f  config-sony-coconut.armhf
 d80980e9474c82ba0ef1a6903b434d8bd1b092c40367ba543e72d2c119301c8b2d05265740e4104ca1ac5d15f6c4aa49e8776cb44264a9a28dc551e0d1850dcc  compiler-gcc6.h
 f85ced49ee2f2461adea68dac0a10452aa809a7d41d869092d94eb085344919a9a385dec0c48011f4601ca4f441700f7fe49075c7eca4fb2d66b01f7d413ccb7  01_msm-fix-perf_trace_counters.patch
 7be03a9e78b7ac330a54b1f00509caa0621a95c0c55901878ad757f9dd69cc05ba2c8b5ea987063ae1224f92c4d090d515fa5d369e7755181a4871b0d0f82881  02_gpu-msm-fix-gcc5-compile.patch"

device/linux-sony-coconut/config-sony-coconut.armhf

@@ -2643,9 +2643,9 @@ CONFIG_FB_MSM_MDDI_AUO_HVGA=y
 # CONFIG_FB_MSM_TVOUT_PAL_M is not set
 # CONFIG_FB_MSM_TVOUT_PAL_N is not set
 CONFIG_FB_MSM_TVOUT_NONE=y
-# CONFIG_FB_MSM_DEFAULT_DEPTH_RGB565 is not set
+CONFIG_FB_MSM_DEFAULT_DEPTH_RGB565=y
 # CONFIG_FB_MSM_DEFAULT_DEPTH_ARGB8888 is not set
-CONFIG_FB_MSM_DEFAULT_DEPTH_RGBA8888=y
+# CONFIG_FB_MSM_DEFAULT_DEPTH_RGBA8888 is not set
 # CONFIG_FB_MSM_EBI2_EPSON_S1D_QVGA_PANEL is not set
 # CONFIG_FB_MSM_EBI2_PANEL_DETECT is not set
 # CONFIG_EXYNOS_VIDEO is not set