ARM: uniphier: replace <linux/err.h> with <linux/errno.h>

These files only need error number macros.  Actually, IS_ERR(),
PTR_ERR(), ERR_PTR(), etc. are not useful for U-Boot.  Avoid
unnecessary header includes.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/mach-uniphier/clk/dpll-pro4.c b/arch/arm/mach-uniphier/clk/dpll-pro4.c
index 3ac48d6..d6b6262 100644
--- a/arch/arm/mach-uniphier/clk/dpll-pro4.c
+++ b/arch/arm/mach-uniphier/clk/dpll-pro4.c
@@ -6,7 +6,7 @@
  */
 
 #include <common.h>
-#include <linux/err.h>
+#include <linux/errno.h>
 #include <linux/io.h>
 
 #include "../init.h"