staging: vt6655: remove unused macro

The MAC_MAX_CONTEXT_SIZE macro was not enclosed into parenthesis,
which might have caused hard to debug errors, and caused a sparse
warning.

Since it is unused, we might as well remove it.
Signed-off-by: NGuillaume Clement <gclement@baobob.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vt6655/mac.h

@@ -44,7 +44,6 @@
 //
 #define MAC_MAX_CONTEXT_SIZE_PAGE0  256
 #define MAC_MAX_CONTEXT_SIZE_PAGE1  128
-#define MAC_MAX_CONTEXT_SIZE        MAC_MAX_CONTEXT_SIZE_PAGE0 + MAC_MAX_CONTEXT_SIZE_PAGE1
 
 // Registers not related to 802.11b
 #define MAC_REG_BCFG0       0x00