arm64: defconfig: Enable CONFIG_MTD_ALTERA_SYSMGR

Enable the Stratix10 System Manager by default.
Signed-off-by: NThor Thayer <thor.thayer@linux.intel.com>
Reviewed-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

arch/arm64/configs/defconfig

@@ -432,6 +432,7 @@ CONFIG_MESON_WATCHDOG=m
 CONFIG_RENESAS_WDT=y
 CONFIG_UNIPHIER_WATCHDOG=y
 CONFIG_BCM2835_WDT=y
+CONFIG_MFD_ALTERA_SYSMGR=y
 CONFIG_MFD_BD9571MWV=y
 CONFIG_MFD_AXP20X_I2C=y
 CONFIG_MFD_AXP20X_RSB=y