bcma: fix typo - reading number of slave wrappers

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/bcma/scan.h

@@ -27,7 +27,7 @@
 #define SCAN_CIB_NMW		0x0007C000
 #define SCAN_CIB_NMW_SHIFT	14
 #define SCAN_CIB_NSW		0x00F80000
-#define SCAN_CIB_NSW_SHIFT	17
+#define SCAN_CIB_NSW_SHIFT	19
 #define SCAN_CIB_REV		0xFF000000
 #define SCAN_CIB_REV_SHIFT	24