[SPARC64]: Rewrite convoluted physical memory probing.

Delete all of the code working with sp_banks[] and replace
with clean acquisition and sorting of physical memory
parameters from the firmware.
Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc64/kernel/traps.c

@@ -1333,7 +1333,7 @@ static int cheetah_check_main_memory(unsigned long paddr)
 {
 	unsigned long vaddr = PAGE_OFFSET + paddr;
 
-	if (vaddr > high_memory)
+	if (vaddr > (unsigned long) high_memory)
 		return 0;
 
 	return kern_addr_valid(vaddr);

include/asm-sparc64/openprom.h

@@ -186,8 +186,8 @@ struct linux_prom_registers {
 };
 
 struct linux_prom64_registers {
-	long phys_addr;
-	long reg_size;
+	unsigned long phys_addr;
+	unsigned long reg_size;
 };
 
 struct linux_prom_irqs {