mb/google/kahlee/Kconfig: add remaining SPI speed settings

Before this patch only the SPI settings that will also end up in the
amdfw part of the firmware were specified in the board's Kconfig. This
patch adds the settings from Kahlee's bootblock.c to the Kconfig file
which will be needed in subsequent patches. Also add a comment about the
EM100 case.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: Ie42feb9b41f435c329bf1c78471e65ef5a3fb783
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59967
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>

src/mainboard/google/kahlee/Kconfig

@@ -123,12 +123,22 @@ config OEM_BIN_FILE
 	depends on USE_OEM_BIN
 	default ""
 
-if !EM100
+if !EM100	# EM100 defaults in soc/amd/common/blocks/spi/Kconfig
 config EFS_SPI_READ_MODE
 	default 4          # Dual IO (1-2-2)
 
 config EFS_SPI_SPEED
 	default 0	# 66MHz
+
+config NORMAL_READ_SPI_SPEED
+	default 1	# 33MHz
+
+config ALT_SPI_SPEED
+	default 0	# 66MHz
+
+config TPM_SPI_SPEED
+	default 0	# 66MHz
+
 endif
 
 # Don't use AMD's Secure OS