k2hk: add support for k2hk SOC and EVM

k2hk EVM is based on Texas Instruments Keystone2 Hawking/Kepler
SoC. Keystone2 SoC has ARM v7 Cortex-A15 MPCore processor. Please
refer the ti/k2hk_evm/README for details on the board, build and other
information.

This patch add support for keystone architecture and k2hk evm.

Signed-off-by: Vitaly Andrianov <vitalya@ti.com>
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: WingMan Kwok <w-kwok2@ti.com>
Signed-off-by: Sandeep Nair <sandeep_n@ti.com>
diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c
index fbc37b2..8a13454 100644
--- a/drivers/serial/ns16550.c
+++ b/drivers/serial/ns16550.c
@@ -30,6 +30,11 @@
 #define serial_in(y)		readb(y)
 #endif
 
+#if defined(CONFIG_K2HK_EVM)
+#define UART_REG_VAL_PWREMU_MGMT_UART_DISABLE   0
+#define UART_REG_VAL_PWREMU_MGMT_UART_ENABLE ((1 << 14) | (1 << 13) | (1 << 0))
+#endif
+
 #ifndef CONFIG_SYS_NS16550_IER
 #define CONFIG_SYS_NS16550_IER  0x00
 #endif /* CONFIG_SYS_NS16550_IER */
@@ -77,6 +82,9 @@
 	/* /16 is proper to hit 115200 with 48MHz */
 	serial_out(0, &com_port->mdr1);
 #endif /* CONFIG_OMAP */
+#if defined(CONFIG_K2HK_EVM)
+	serial_out(UART_REG_VAL_PWREMU_MGMT_UART_ENABLE, &com_port->regC);
+#endif
 }
 
 #ifndef CONFIG_NS16550_MIN_FUNCTIONS