mx28: Rename regs-power.h to regs-power-mx28.h

The i.MX23 has different register layout and bit placement in the
power supply. Thus, in order to be able to add support for MX23,
rename the MX28's regs-power.h to regs-power-mx28.h . Moreover,
add ifdef around inclusion of regs-*-mx28.h in imx-regs.h so the
MX23 boards will include proper set of registers.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Stefano Babic <sbabic@denx.de>

arch/arm/include/asm/arch-mxs/imx-regs.h

@@ -26,7 +26,6 @@
 #include <asm/arch/regs-apbh.h>
 #include <asm/arch/regs-base.h>
 #include <asm/arch/regs-bch.h>
-#include <asm/arch/regs-clkctrl-mx28.h>
 #include <asm/arch/regs-digctl.h>
 #include <asm/arch/regs-gpmi.h>
 #include <asm/arch/regs-i2c.h>
@@ -34,9 +33,13 @@
 #include <asm/arch/regs-lradc.h>
 #include <asm/arch/regs-ocotp.h>
 #include <asm/arch/regs-pinctrl.h>
-#include <asm/arch/regs-power.h>
 #include <asm/arch/regs-rtc.h>
 #include <asm/arch/regs-ssp.h>
 #include <asm/arch/regs-timrot.h>
 
+#ifdef CONFIG_MX28
+#include <asm/arch/regs-clkctrl-mx28.h>
+#include <asm/arch/regs-power-mx28.h>
+#endif
+
 #endif	/* __IMX_REGS_H__ */