board: atmel: clean up the PMC_PLLICPR init code

Due to introducing the PMC_PLLICPR init function, use this
function to clean up the code.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Tested-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Andreas Bießmann <andreas.devel@googlemail.com>
diff --git a/board/atmel/sama5d3xek/sama5d3xek.c b/board/atmel/sama5d3xek/sama5d3xek.c
index 8576560..e8ee612 100644
--- a/board/atmel/sama5d3xek/sama5d3xek.c
+++ b/board/atmel/sama5d3xek/sama5d3xek.c
@@ -10,7 +10,6 @@
 #include <asm/io.h>
 #include <asm/arch/sama5d3_smc.h>
 #include <asm/arch/at91_common.h>
-#include <asm/arch/at91_pmc.h>
 #include <asm/arch/at91_rstc.h>
 #include <asm/arch/gpio.h>
 #include <asm/arch/clk.h>
@@ -457,7 +456,6 @@
 
 void at91_pmc_init(void)
 {
-	struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
 	u32 tmp;
 
 	tmp = AT91_PMC_PLLAR_29 |
@@ -466,7 +464,7 @@
 	      AT91_PMC_PLLXR_DIV(1);
 	at91_plla_init(tmp);
 
-	writel(0x3 << 8, &pmc->pllicpr);
+	at91_pllicpr_init(AT91_PMC_IPLL_PLLA(0x3));
 
 	tmp = AT91_PMC_MCKR_MDIV_4 |
 	      AT91_PMC_MCKR_CSS_PLLA;