siemens/sitemp_g1p1: Make ACPI report the right mmconf region

ACPI reported the entire space between top-of-memory and some
(relatively) arbitrary limit as useful for MMIO. Unfortunately
the HyperTransport configuration disagreed. Make them match up.

Other boards are not affected since they don't report any region
for that purpose at all (it seems).

Change-Id: I432a679481fd1c271f14ecd6fe74f0b7a15a698e
Signed-off-by: Patrick Georgi <patrick.georgi@secunet.com>
Reviewed-on: http://review.coreboot.org/3047
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/include/cpu/amd/amdk8_sysconf.h

@@ -21,6 +21,8 @@ struct amdk8_sysconf_t {
 
 	void *mb; // pointer for mb releated struct
 
+	unsigned mmconf_start;
+	unsigned mmconf_end;
 };
 
 extern struct amdk8_sysconf_t sysconf;