rockchip: rk3399-puma: support Gigadevice SPI-NOR flash

Over the last quarter, a part of our production has used NOR flash
from Gigadevice in addition to the Winbond parts that we typically
source.  This requires the SPI_FLASH_GIGADEVICE config to be set.

Enable SPI_FLASH_GIGADEVICE in the board's default defconfig.

Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Klaus Goger <klaus.goger@theobroma-systems.com>
diff --git a/configs/puma-rk3399_defconfig b/configs/puma-rk3399_defconfig
index f9f98c9..964464a 100644
--- a/configs/puma-rk3399_defconfig
+++ b/configs/puma-rk3399_defconfig
@@ -69,6 +69,7 @@
 CONFIG_MMC_SDHCI_ROCKCHIP=y
 CONFIG_SPI_FLASH=y
 CONFIG_SF_DEFAULT_SPEED=20000000
+CONFIG_SPI_FLASH_GIGADEVICE=y
 CONFIG_SPI_FLASH_WINBOND=y
 CONFIG_PHY_MICREL=y
 CONFIG_PHY_MICREL_KSZ90X1=y