staging: rtl8712: rtl8712_efuse.c: Remove leading p from variable names

Remove leading 'p' from the name of the pointer variable padapter.
Issue found with Coccinelle.

Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>