UPSTREAM: tty: serial: samsung_tty: use 'unsigned int' not 'unsigned'

The function uart_console_write() expects an unsigned int, so use that
variable type, not 'unsigned', which is generally frowned apon in the
kernel now.

Bug: 144661360
Cc: Kukjin Kim <kgene@kernel.org>
Cc: Hyunki Koo <kkoos00@naver.com>
Cc: HYUN-KI KOO <hyunki00.koo@samsung.com>
Cc: Shinbeom Choi <sbeom.choi@samsung.com>
Cc: Jiri Slaby <jslaby@suse.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-samsung-soc@vger.kernel.org
Cc: linux-serial@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20191210143706.3928480-8-gregkh@linuxfoundation.org


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 90ece856a227c4a787f0c79105810f740c65c472)
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I77a41561120dba5b7e0aa4c2080ba77627ba8db0