Code cleanup: fix old style assignment ambiguities like "=-" etc.

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/common/usb_kbd.c b/common/usb_kbd.c
index 1e79208..c876495 100644
--- a/common/usb_kbd.c
+++ b/common/usb_kbd.c
@@ -730,8 +730,8 @@
 		return -1;
 	}
 	printf(" report descriptor (size %u, read %d)\n", len, index);
-	start=&buffer[0];
-	end=&buffer[len];
+	start = &buffer[0];
+	end = &buffer[len];
 	i=0;
 	do {
 		index=fetch_item(start,end,&item);