Convert CONFIG_CMD_HD44760 to Kconfig

This converts the following to Kconfig:
   CONFIG_CMD_HD44760

Also drop CONFIG_CMD_HD44780 which appears to be a typo.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/work_92105_defconfig b/configs/work_92105_defconfig
index 9ce932f..06b31ba 100644
--- a/configs/work_92105_defconfig
+++ b/configs/work_92105_defconfig
@@ -4,6 +4,7 @@
 CONFIG_SPL_LIBGENERIC_SUPPORT=y
 CONFIG_SPL_SERIAL_SUPPORT=y
 CONFIG_SPL_NAND_SUPPORT=y
+CONFIG_CMD_HD44760=y
 CONFIG_BOOTDELAY=3
 CONFIG_VERSION_VARIABLE=y
 # CONFIG_DISPLAY_BOARDINFO is not set