netport_con.c: fix build errors and warnings

Fix build broken by accaa24c492f1aa3b9c37226d868dc59c3007531:

  CC      drivers/video/console/newport_con.o
drivers/video/console/newport_con.c: In function 'newport_show_logo':
drivers/video/console/newport_con.c:111: error: assignment of read-only location
drivers/video/console/newport_con.c:111: warning: assignment makes integer from pointer without a cast
drivers/video/console/newport_con.c:112: error: assignment of read-only location
drivers/video/console/newport_con.c:112: warning: assignment makes integer from pointer without a cast

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Cc: "Randy.Dunlap" <rdunlap@xenotime.net>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/video/console/newport_con.c

@@ -98,7 +98,7 @@ static inline void newport_init_cmap(void)
 	}
 }
 
-static struct linux_logo *newport_show_logo(void)
+static const struct linux_logo *newport_show_logo(void)
 {
 #ifdef CONFIG_LOGO_SGI_CLUT224
 	const struct linux_logo *logo = fb_find_logo(8);
@@ -108,8 +108,8 @@ static struct linux_logo *newport_show_logo(void)
 
 	if (!logo)
 		return NULL;
-	*clut = logo->clut;
-	*data = logo->data;
+	clut = logo->clut;
+	data = logo->data;
 
 	for (i = 0; i < logo->clutsize; i++) {
 		newport_bfwait(npregs);