kernel: x86_64: drop CALGARY IOMMU on 5.4

It's snuck back in on kernel 5.4 configs, so drop it there too.

Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>

target/linux/x86/64/config-5.4

@@ -70,8 +70,8 @@ CONFIG_BLK_MQ_VIRTIO=y
 CONFIG_BLK_PM=y
 # CONFIG_BOOTPARAM_HOTPLUG_CPU0 is not set
 CONFIG_BTT=y
-CONFIG_CALGARY_IOMMU=y
-CONFIG_CALGARY_IOMMU_ENABLED_BY_DEFAULT=y
+# CONFIG_CALGARY_IOMMU is not set
+# CONFIG_CALGARY_IOMMU_ENABLED_BY_DEFAULT is not set
 CONFIG_CONNECTOR=y
 # CONFIG_CPU_HOTPLUG_STATE_CONTROL is not set
 # CONFIG_CPU_IDLE_GOV_HALTPOLL is not set