staging: ks7010: Wrap macro definitions in parenthesis

Wrap the definition of TX_RATE_* constants in parenthesis to prevent
incorrect casting during expansion, as recommended by checkpatch.pl.

Signed-off-by: Caleb D.S. Brzezinski <calebdsb@protonmail.com>
Link: https://lore.kernel.org/r/20210616212552.117604-1-calebdsb@protonmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>