staging: rtl8192e: clean unnecessary braces warning on r8192E_phy.c

Clean a checkpatch.pl warning of type "braces {} are not necessary for
single statement blocks" on r8192E_phy.c file.

Signed-off-by: David Tadokoro <davidbtadokoro@usp.br>
Link: https://lore.kernel.org/r/20230528154010.3068-1-davidbtadokoro@usp.br


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