Correct bool variable type assignment to follow upstream

In response to below commit which was merged to upstream for v5.8
"PCI/switchtec: Correct bool variable type assignment"
torvalds/linux@b8af854

Author: kelvin-cao

switchtec.c

@@ -36,7 +36,7 @@ static int max_devices = 16;
 module_param(max_devices, int, 0644);
 MODULE_PARM_DESC(max_devices, "max number of switchtec device instances");
 
-static bool use_dma_mrpc = 1;
+static bool use_dma_mrpc = true;
 module_param(use_dma_mrpc, bool, 0644);
 MODULE_PARM_DESC(use_dma_mrpc,
 		 "Enable the use of the DMA MRPC feature");