clk: samsung: Use common registration function for pll2550x

There is no such significant differences in pll2550x PLL type
to justify a separate registration function.  This patch adapts
exynos5440 driver to use the common function and removes
samsung_clk_register_pll2550x().

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
diff --git a/include/dt-bindings/clock/exynos5440.h b/include/dt-bindings/clock/exynos5440.h
index c66fc40..842cdc0 100644
--- a/include/dt-bindings/clock/exynos5440.h
+++ b/include/dt-bindings/clock/exynos5440.h
@@ -14,6 +14,8 @@
 
 #define CLK_XTAL		1
 #define CLK_ARM_CLK		2
+#define CLK_CPLLA		3
+#define CLK_CPLLB		4
 #define CLK_SPI_BAUD		16
 #define CLK_PB0_250		17
 #define CLK_PR0_250		18