(console,drivers/uart)/Kconfig: Fix dependencies

The dependencies of CONSOLE_SERIAL and DRIVERS_UART were somehow
backwards. Fix that. Now, CONSOLE_SERIAL depends on DRIVERS_UART,
because it's using its interface. The individual UART drivers
select DRIVERS_UART, because they implement the interface and
depend on the common UART code.

Some guards had to be fixed (using CONSOLE_SERIAL now instead of
DRIVERS_UART). Some other guards that were only about compilation
of units were removed. We want to build test as much as possible,
right?

Change-Id: I0ea73a8909f07202b23c88db93df74cf9dc8abf9
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/29572
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

src/soc/qualcomm/ipq40xx/uart.c

@@ -107,7 +107,6 @@ static unsigned int msm_boot_uart_dm_init_rx_transfer(void *uart_dm_base)
 	return MSM_BOOT_UART_DM_E_SUCCESS;
 }
 
-#if IS_ENABLED(CONFIG_DRIVERS_UART)
 static unsigned int msm_boot_uart_dm_init(void  *uart_dm_base);
 
 /* Received data is valid or not */
@@ -116,7 +115,6 @@ static int valid_data = 0;
 /* Received data */
 static unsigned int word = 0;
 
-
 void uart_tx_byte(int idx, unsigned char data)
 {
 	int num_of_chars = 1;
@@ -135,7 +133,6 @@ void uart_tx_byte(int idx, unsigned char data)
 	/* And now write the character(s) */
 	write32(MSM_BOOT_UART_DM_TF(base, 0), data);
 }
-#endif /* CONFIG_SERIAL_UART */
 
 /**
  * @brief msm_boot_uart_dm_reset - resets UART controller
@@ -270,7 +267,6 @@ void uart_tx_flush(int idx)
 		;
 }
 
-#if IS_ENABLED(CONFIG_DRIVERS_UART)
 /**
  * ipq40xx_serial_getc - reads a character
  *
@@ -286,7 +282,6 @@ uint8_t uart_rx_byte(int idx)
 
 	return byte;
 }
-#endif
 
 #ifndef __PRE_RAM__
 /* TODO: Implement function */