spi: Migrate CONFIG_SH_QSPI to Kconfig

Signed-off-by: Tuomas Tynkkynen <tuomas@tuxera.com>
diff --git a/configs/porter_defconfig b/configs/porter_defconfig
index 3e3adba..38501d0 100644
--- a/configs/porter_defconfig
+++ b/configs/porter_defconfig
@@ -49,6 +49,7 @@
 CONFIG_DM_REGULATOR_FIXED=y
 CONFIG_DM_REGULATOR_GPIO=y
 CONFIG_SCIF_CONSOLE=y
+CONFIG_SH_QSPI=y
 CONFIG_USB=y
 CONFIG_DM_USB=y
 CONFIG_USB_EHCI_HCD=y