ARM: dts: Add more opp levels in exynos5440

This patch updates cpu frequency level from 1500 to 800MHZ in steps
of 100MHZ. The corresponding voltage(in uV) is also added.

Signed-off-by: Amit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/boot/dts/exynos5440.dtsi

@@ -83,8 +83,13 @@
 		interrupts = <0 57 0>;
 		operating-points = <
 				/* KHz	  uV */
+				1500000 1100000
+				1400000 1075000
+				1300000 1050000
 				1200000 1025000
+				1100000 1000000
 				1000000 975000
+				900000  950000
 				800000  925000
 		>;
 	};