rpi: Enable USB keyboard support

This is currently disabled, so USB keyboards are not detected in U-Boot.
Enable this option to fix that.

Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Jonathan Gray <jsg@jsg.id.au>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Paul Barker <pbarker@toganlabs.com>

configs/rpi_2_defconfig

@@ -15,6 +15,7 @@ CONFIG_SYS_PROMPT="U-Boot> "
 CONFIG_CMD_GPIO=y
 CONFIG_CMD_MMC=y
 CONFIG_CMD_USB=y
+CONFIG_DM_KEYBOARD=y
 CONFIG_DM_MMC=y
 CONFIG_MMC_SDHCI=y
 CONFIG_MMC_SDHCI_BCM2835=y

configs/rpi_3_32b_defconfig

@@ -16,6 +16,7 @@ CONFIG_SYS_PROMPT="U-Boot> "
 CONFIG_CMD_GPIO=y
 CONFIG_CMD_MMC=y
 CONFIG_CMD_USB=y
+CONFIG_DM_KEYBOARD=y
 CONFIG_DM_MMC=y
 CONFIG_MMC_SDHCI=y
 CONFIG_MMC_SDHCI_BCM2835=y

configs/rpi_3_defconfig

@@ -16,6 +16,7 @@ CONFIG_SYS_PROMPT="U-Boot> "
 CONFIG_CMD_GPIO=y
 CONFIG_CMD_MMC=y
 CONFIG_CMD_USB=y
+CONFIG_DM_KEYBOARD=y
 CONFIG_DM_MMC=y
 CONFIG_MMC_SDHCI=y
 CONFIG_MMC_SDHCI_BCM2835=y

configs/rpi_defconfig

@@ -15,6 +15,7 @@ CONFIG_SYS_PROMPT="U-Boot> "
 CONFIG_CMD_GPIO=y
 CONFIG_CMD_MMC=y
 CONFIG_CMD_USB=y
+CONFIG_DM_KEYBOARD=y
 CONFIG_DM_MMC=y
 CONFIG_MMC_SDHCI=y
 CONFIG_MMC_SDHCI_BCM2835=y