keystone2: use CONFIG_SOC_KEYSTONE in common places

Use CONFIG_SOC_KEYSTONE in common places instead of defining
a lot of "if def .. || if def " for different Keystone2 SoC types.

Acked-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@ti.com>

common/image-fdt.c

@@ -492,7 +492,7 @@ int image_setup_libfdt(bootm_headers_t *images, void *blob,
 	if (!ft_verify_fdt(blob))
 		return -1;
 
-#ifdef CONFIG_SOC_K2HK
+#if defined(CONFIG_SOC_KEYSTONE)
 	if (IMAGE_OF_BOARD_SETUP)
 		ft_board_setup_ex(blob, gd->bd);
 #endif

drivers/serial/ns16550.c

@@ -30,7 +30,7 @@
 #define serial_in(y)		readb(y)
 #endif
 
-#if defined(CONFIG_K2HK_EVM)
+#if defined(CONFIG_SOC_KEYSTONE)
 #define UART_REG_VAL_PWREMU_MGMT_UART_DISABLE   0
 #define UART_REG_VAL_PWREMU_MGMT_UART_ENABLE ((1 << 14) | (1 << 13) | (1 << 0))
 #undef UART_MCRVAL
@@ -88,7 +88,7 @@ void NS16550_init(NS16550_t com_port, int baud_divisor)
 	/* /16 is proper to hit 115200 with 48MHz */
 	serial_out(0, &com_port->mdr1);
 #endif /* CONFIG_OMAP */
-#if defined(CONFIG_K2HK_EVM)
+#if defined(CONFIG_SOC_KEYSTONE)
 	serial_out(UART_REG_VAL_PWREMU_MGMT_UART_ENABLE, &com_port->regC);
 #endif
 }