serial: exar: fix checkpach warnings

serial: exar: fix checkpach warnings

-Fix several "missing identifier name" warnings from checkpatch in
struct exar8250_platform and struct exar8250_board.
Example:

WARNING: function definition argument <arg> should also have an
identifier name

- Fix space before tab warning from checkpatch:
WARNING: please, no space before tabs
+ * 0^I^I2 ^IMode bit 0$

Signed-off-by: Parker Newman <pnewman@connecttech.com>
Link: https://lore.kernel.org/r/f7fa6c16cb5f2c8c1c7cb7d29f80bc7be53f91ab.1713382717.git.pnewman@connecttech.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>