config.dell_optiplex_9010_sff: Specify board model

Add `CONFIG_BOARD_DELL_OPTIPLEX_9010=y` to avoid issues when other Dell
mainboards get added.

Change-Id: Ice2073a3073a345aeb9ead7398cb4129453dd5ba
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55274
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>
diff --git a/configs/config.dell_optiplex_9010_sff b/configs/config.dell_optiplex_9010_sff
index e25653e..b0ef91b 100644
--- a/configs/config.dell_optiplex_9010_sff
+++ b/configs/config.dell_optiplex_9010_sff
@@ -1,6 +1,7 @@
 CONFIG_USE_OPTION_TABLE=y
 CONFIG_USE_BLOBS=y
 CONFIG_VENDOR_DELL=y
+CONFIG_BOARD_DELL_OPTIPLEX_9010=y
 CONFIG_ONBOARD_VGA_IS_PRIMARY=y
 # CONFIG_DRIVERS_UART_8250IO is not set
 CONFIG_PCIEXP_CLK_PM=y