soc/amd/picasso: remove PICASSO_ACPI_IO_BASE Kconfig option

This was the only I/O base address in Kconfig, no board changed it and
if a board changed it, it needs to make sure that it won't overlap with
other I/O resources, so just use the same value as constant in the
define instead of the value from Kconfig. Also remove the PICASSO_
prefix from ACPI_IO_BASE.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I7ea62f1101ddefa8785da92de5ba2aaf7945694a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50287
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>

src/soc/amd/picasso/Kconfig

@@ -263,12 +263,6 @@ config SERIRQ_CONTINUOUS_MODE
 	  Set this option to y for serial IRQ in continuous mode.
 	  Otherwise it is in quiet mode.
 
-config PICASSO_ACPI_IO_BASE
-	hex
-	default 0x400
-	help
-	  Base address for the ACPI registers.
-
 config CONSOLE_UART_BASE_ADDRESS
 	depends on CONSOLE_SERIAL && AMD_SOC_CONSOLE_UART
 	hex