staging: rtl8712: Add space between operands and operator

Add whitespace in union recvstat between operator '>>' and operands
'RXDESC_SIZE' and '2' to conform to common kernel coding style.

Signed-off-by: Ayush Tiwari <ayushtiw0110@gmail.com>
Link: https://lore.kernel.org/r/ZgCYHwYOmqfwMeU0@ayush-HP-Pavilion-Gaming-Laptop-15-ec0xxx


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