dpaa2: cleanup some include files

2782ed8f6c fixed the standalone module
build.  REmove the now duplicate includes for opt_acpi.h and
opt_platform.h.  Als remove the if_mdio.h again in both the Makefile
and the implementation file as it is not (currently) used.

X-MFC with:	ba7319e909
MFC after:	70 days

sys/dev/dpaa2/dpaa2_ni.c

@@ -85,7 +85,6 @@ __FBSDID("$FreeBSD$");
 #include "pcib_if.h"
 #include "pci_if.h"
 #include "miibus_if.h"
-#include "mdio_if.h"
 #include "memac_mdio_if.h"
 
 #include "dpaa2_types.h"

sys/modules/dpaa2/Makefile

@@ -19,13 +19,11 @@ SRCS+=	memac_mdio_common.c memac_mdio_if.c memac_mdio_if.h
 
 SRCS+=	bus_if.h device_if.h miibus_if.h
 SRCS+=	pcib_if.h pci_if.h
-SRCS+=	mdio_if.h
 SRCS+=	opt_acpi.h opt_platform.h
 
 .if !empty(OPT_ACPI)
 SRCS+=	dpaa2_mc_acpi.c \
 	memac_mdio_acpi.c \
-	opt_acpi.h \
 	acpi_if.h \
 	acpi_bus_if.h
 .endif
@@ -33,7 +31,6 @@ SRCS+=	dpaa2_mc_acpi.c \
 .if !empty(OPT_FDT)
 SRCS+=	dpaa2_mc_fdt.c \
 	memac_mdio_fdt.c \
-	opt_platform.h \
 	ofw_bus_if.h
 .endif