UPSTREAM: {tty: serial, nand: onenand}: samsung: rename to fix build warning

Any arm config which has 'CONFIG_MTD_ONENAND_SAMSUNG=m' and
'CONFIG_SERIAL_SAMSUNG=m' gives a build warning:

warning: same module names found:
  drivers/tty/serial/samsung.ko
  drivers/mtd/nand/onenand/samsung.ko

Rename both drivers/tty/serial/samsung.c to
drivers/tty/serial/samsung_tty.c and drivers/mtd/nand/onenand/samsung.c
drivers/mtd/nand/onenand/samsung_mtd.c to fix the warning.

Bug: 144661360
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Acked-by: Richard Weinberger <richard@nod.at>
Link: https://lore.kernel.org/r/20191117202435.28127-1-sudipm.mukherjee@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 55ed51fff224a51dfb768cfac3e4498888474c87)
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I05ff73f03afe170c78755414f287ccbf418e7c50