iommu/amd: remove duplicated include from amd_iommu_init.c

Remove duplicated include.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

drivers/iommu/amd_iommu_init.c

@@ -26,7 +26,6 @@
 #include <linux/msi.h>
 #include <linux/amd-iommu.h>
 #include <linux/export.h>
-#include <linux/acpi.h>
 #include <acpi/acpi.h>
 #include <asm/pci-direct.h>
 #include <asm/iommu.h>