spi: ltq_ssc - Remove all dump_stack() calls

Initially added for debugging purposes, they have been misinterpreted as
kernel crash, see UGW_SW-23605. Original issue has been root-caused to spurious
interrupts received by the DECT driver. Remove as they are not longer required.

drivers/spi/ltq_ssc.c

@@ -2864,13 +2864,11 @@ static int ifx_validate_params(IFX_SSC_HANDLE handler, char *txbuf, int txsize,
 
 	if (!handler) {
 		LOGF_KLOG_ERROR("%s: invalid handler\n", __func__);
-		dump_stack();
 		goto out;
 	}
 
 	if (!rxbuf && rxsize == 0 && !txbuf && txsize == 0) {
 		LOGF_KLOG_ERROR("%s: invalid data\n");
-		dump_stack();
 		goto out;
 	}