kirkwood: make MPP arrays static const

This saves stack and code memory for local copy, and
consumes initialized data memory. For 22 of the 29
kirkwood-based boards, this results in a global saving
of about 30 bytes. For 7 of them, it results in an
increase of 6 to 14 bytes.

Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>

board/raidsonic/ib62x0/ib62x0.c

@@ -45,7 +45,7 @@ int board_early_init_f(void)
 	/* Set SATA activity LEDs to default off */
 	writel(MVSATAHC_LED_POLARITY_CTRL, MVSATAHC_LED_CONF_REG);
 	/* Multi-Purpose Pins Functionality configuration */
-	u32 kwmpp_config[] = {
+	static const u32 kwmpp_config[] = {
 		MPP0_NF_IO2,
 		MPP1_NF_IO3,
 		MPP2_NF_IO4,