parisc: processor.c, fix bloated stack frame

The pa_pdc_cell struct can be kmalloc'd, so do that instead.
Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>

arch/parisc/kernel/processor.c

@@ -120,22 +120,28 @@ static int __cpuinit processor_probe(struct parisc_device *dev)
 	if (is_pdc_pat()) {
 		ulong status;
 		unsigned long bytecnt;
-	        pdc_pat_cell_mod_maddr_block_t pa_pdc_cell;
+	        pdc_pat_cell_mod_maddr_block_t *pa_pdc_cell;
 #undef USE_PAT_CPUID
 #ifdef USE_PAT_CPUID
 		struct pdc_pat_cpu_num cpu_info;
 #endif
 
+		pa_pdc_cell = kmalloc(sizeof (*pa_pdc_cell), GFP_KERNEL);
+		if (!pa_pdc_cell)
+			panic("couldn't allocate memory for PDC_PAT_CELL!");
+
 		status = pdc_pat_cell_module(&bytecnt, dev->pcell_loc,
-			dev->mod_index, PA_VIEW, &pa_pdc_cell);
+			dev->mod_index, PA_VIEW, pa_pdc_cell);
 
 		BUG_ON(PDC_OK != status);
 
 		/* verify it's the same as what do_pat_inventory() found */
-		BUG_ON(dev->mod_info != pa_pdc_cell.mod_info);
-		BUG_ON(dev->pmod_loc != pa_pdc_cell.mod_location);
+		BUG_ON(dev->mod_info != pa_pdc_cell->mod_info);
+		BUG_ON(dev->pmod_loc != pa_pdc_cell->mod_location);
+
+		txn_addr = pa_pdc_cell->mod[0];   /* id_eid for IO sapic */
 
-		txn_addr = pa_pdc_cell.mod[0];   /* id_eid for IO sapic */
+		kfree(pa_pdc_cell);
 
 #ifdef USE_PAT_CPUID
 /* We need contiguous numbers for cpuid. Firmware's notion