ARM: uniphier: rename umc-ld20-regs.h to umc64-regs.h

This header will be shared between PH1-LD11 and PH1-LD20
(and hopefully new ARMv8 SoCs developed in the future),
so umc64-regs.h would be a better fit.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>

arch/arm/mach-uniphier/dram/umc-ld20.c

@@ -15,7 +15,7 @@
 
 #include "../init.h"
 #include "ddrphy-ld20-regs.h"
-#include "umc-ld20-regs.h"
+#include "umc64-regs.h"
 
 #define DRAM_CH_NR	3