k2hk: use common KS2_ prefix for all hardware definitions

Use KS2_ prefix in all definitions, for that replace K2HK_ prefix and
add KS2_ prefix where it's needed. It requires to change names also
in places where they're used. Align lines and remove redundant
definitions in kardware-k2hk.h at the same time.

Using common KS2_ prefix helps resolve redundant redefinitions and
adds opportunity to use KS2_ definition across a project not thinking about
what SoC should be used. It's more convenient and we don't need to worry
about the SoC type in common files, hardware.h will think about that.
The hardware.h decides definitions of what SoC to use.

Acked-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@ti.com>
diff --git a/arch/arm/include/asm/arch-keystone/hardware.h b/arch/arm/include/asm/arch-keystone/hardware.h
index 0dcc31a..133edad 100644
--- a/arch/arm/include/asm/arch-keystone/hardware.h
+++ b/arch/arm/include/asm/arch-keystone/hardware.h
@@ -105,7 +105,7 @@
 #ifndef __ASSEMBLY__
 static inline int cpu_is_k2hk(void)
 {
-	unsigned int jtag_id	= __raw_readl(JTAG_ID_REG);
+	unsigned int jtag_id	= __raw_readl(KS2_JTAG_ID_REG);
 	unsigned int part_no	= (jtag_id >> 12) & 0xffff;
 
 	return (part_no == 0xb981) ? 1 : 0;
@@ -113,7 +113,7 @@
 
 static inline int cpu_revision(void)
 {
-	unsigned int jtag_id	= __raw_readl(JTAG_ID_REG);
+	unsigned int jtag_id	= __raw_readl(KS2_JTAG_ID_REG);
 	unsigned int rev	= (jtag_id >> 28) & 0xf;
 
 	return rev;