Rockchip: Do not print out a SYS_ioctl error message at the end of VIDIOC_ENUM_FMT enumeration loop

Do not print out SYS_ioctl error message, when cmd is VIDIOC_ENUM_FMT and
it returns EINVAL.
It would be at the end of enumeration loop. It is not a real error then.

BUG=chromium:742688
TEST=VEA unittest on kevin

Change-Id: I78802f0351fe145107e89b7b296e6b75eae2f350
Reviewed-on: https://chromium-review.googlesource.com/578529


Commit-Ready: Hirokazu Honda <hiroh@chromium.org>
Tested-by: Hirokazu Honda <hiroh@chromium.org>
Reviewed-by: Pawel Osciak <posciak@chromium.org>

libv4l-rockchip/libv4l-encplugin-rockchip.c

@@ -30,7 +30,8 @@
 #define SYS_IOCTL(fd, cmd, arg) ({ 						\
 	int ret = syscall(SYS_ioctl, (int)(fd), (unsigned long)(cmd),		\
 			(void *)(arg));						\
-	if ((ret && errno != EAGAIN) || g_log_level >= 2)			\
+	if (g_log_level >= 2 || (ret && errno != EAGAIN &&			\
+                                 (cmd != VIDIOC_ENUM_FMT || errno != EINVAL))) \
 		fprintf(stderr, "SYS_ioctl: %s(%lu): fd=%d, ret=%d, errno=%d\n",\
 			v4l_cmd2str(cmd), _IOC_NR((unsigned long)cmd), fd, ret,	\
 			errno);							\

libv4l-rockchip_v2/libv4l-encplugin-rockchip.c

@@ -30,7 +30,8 @@
 #define SYS_IOCTL(fd, cmd, arg) ({ 						\
 	int ret = syscall(SYS_ioctl, (int)(fd), (unsigned long)(cmd),		\
 			(void *)(arg));						\
-	if ((ret && errno != EAGAIN) || g_log_level >= 2)			\
+	if (g_log_level >= 2 || (ret && errno != EAGAIN &&			\
+                                 (cmd != VIDIOC_ENUM_FMT || errno != EINVAL))) \
 		fprintf(stderr, "SYS_ioctl: %s(%lu): fd=%d, ret=%d, errno=%d\n",\
 			v4l_cmd2str(cmd), _IOC_NR((unsigned long)cmd), fd, ret,	\
 			errno);							\