CHROMIUM: media: camx: remove cam_io_phy_dump()

cam_io_phy_dump() is identical to cam_io_dump(), so we
should use it.  This also addresses warnings that were
already fixed by Ricardo,

cam_csiphy_soc.c:47:4: warning:
'snprintf' will always be truncated; specified size is 12,
but format string expands to at least 13 [-Wformat-truncation]
cam_csiphy_soc.c:52:3: warning:
'snprintf' will always be truncated; specified size is 9,
but format string expands to at least 10 [-Wformat-truncation]

UPSTREAM-TASK=b:274966069
BUG=none
TEST=compile tested

Change-Id: Ia0646660bc8d7924ddb8c8cb4f27efec76ec79ef
Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/5904573


Reviewed-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: Mateusz Urbańczyk <urbanczyk@google.com>