Extend Altera Jtag Uart driver support without Altera HAL driver
by default. uart_altera_jtag_hal.c renamed to uart_altera_jtag.c and
new config, CONFIG_UART_ALTERA_JTAG_HAL is introduced to allow driver
to use Altera HAL driver when needed.
Signed-off-by: Khor Swee Aun <swee.aun.khor@intel.com>