Revert "Get rid of _t suffix"

In the very least, a change like this requires discussion on the list.

The naming convention is goofy and it causes a massive merge problem.  Something
like this _must_ be presented on the list first so people can provide input
and cope with it.

This reverts commit 99a0949b720a0936da2052cb9a46db04ffc6db29.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/hw/isa.h b/hw/isa.h
index 1644a12..655ad62 100644
--- a/hw/isa.h
+++ b/hw/isa.h
@@ -30,9 +30,9 @@
 ISADevice *isa_create(const char *name);
 ISADevice *isa_create_simple(const char *name);
 
-extern a_target_phys_addr isa_mem_base;
+extern target_phys_addr_t isa_mem_base;
 
-void isa_mmio_init(a_target_phys_addr base, a_target_phys_addr size);
+void isa_mmio_init(target_phys_addr_t base, target_phys_addr_t size);
 
 /* dma.c */
 int DMA_get_channel_mode (int nchan);