MIPS: lantiq: Set physical_memsize

physical_memsize is needed by the vpe loader code and the platform
specific code has to define it. This value will be given to the
firmware loaded with the VPE loader. I am not aware of any standard
interface or better value to provide here.

Reported-by: kbuild test robot <[email protected]>
Fixes: d9ae4f18c0 ("MIPS: Lantiq: Activate more drivers in default configuration")
Signed-off-by: Hauke Mehrtens <[email protected]>
Cc: Ralf Baechle <[email protected]>
Cc: John Crispin <[email protected]>
Cc: Paul Gortmaker <[email protected]>
Cc: [email protected]
Patchwork: https://patchwork.linux-mips.org/patch/14908/
Signed-off-by: James Hogan <[email protected]>

arch/mips/lantiq/prom.c

@@ -25,6 +25,12 @@
 DEFINE_SPINLOCK(ebu_lock);
 EXPORT_SYMBOL_GPL(ebu_lock);
 
+/*
+ * This is needed by the VPE loader code, just set it to 0 and assume
+ * that the firmware hardcodes this value to something useful.
+ */
+unsigned long physical_memsize = 0L;
+
 /*
  * this struct is filled by the soc specific detection code and holds
  * information about the specific soc type, revision and name