[x86_64] Fix assorted 64-bit compilation errors and warnings

Remove various 32-bit assumptions scattered throughout the codebase.
The code is still not necessarily 64-bit clean, but will at least
compile.

src/drivers/infiniband/arbel.c

@@ -27,6 +27,7 @@
 #include <unistd.h>
 #include <errno.h>
 #include <byteswap.h>
+#include <gpxe/io.h>
 #include <gpxe/pci.h>
 #include <gpxe/malloc.h>
 #include <gpxe/umalloc.h>

src/drivers/infiniband/hermon.c

@@ -25,6 +25,7 @@
 #include <unistd.h>
 #include <errno.h>
 #include <byteswap.h>
+#include <gpxe/io.h>
 #include <gpxe/pci.h>
 #include <gpxe/malloc.h>
 #include <gpxe/umalloc.h>

src/drivers/infiniband/linda.c

@@ -21,6 +21,7 @@
 #include <errno.h>
 #include <unistd.h>
 #include <assert.h>
+#include <gpxe/io.h>
 #include <gpxe/pci.h>
 #include <gpxe/infiniband.h>
 #include <gpxe/i2c.h>
@@ -1065,7 +1066,7 @@ static int linda_post_recv ( struct ib_device *ibdev,
 		return -EINVAL;
 	}
 	if ( len != LINDA_RECV_PAYLOAD_SIZE ) {
-		DBGC ( linda, "Linda %p QPN %ld wrong RX buffer size (%d)\n",
+		DBGC ( linda, "Linda %p QPN %ld wrong RX buffer size (%zd)\n",
 		       linda, qp->qpn, len );
 		return -EINVAL;
 	}