Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/pci/mmap.c b/drivers/pci/mmap.c
index 24505b0..b8c9011 100644
--- a/drivers/pci/mmap.c
+++ b/drivers/pci/mmap.c
@@ -73,7 +73,7 @@
 #elif defined(HAVE_PCI_MMAP) /* && !ARCH_GENERIC_PCI_MMAP_RESOURCE */
 
 /*
- * Legacy setup: Impement pci_mmap_resource_range() as a wrapper around
+ * Legacy setup: Implement pci_mmap_resource_range() as a wrapper around
  * the architecture's pci_mmap_page_range(), converting to "user visible"
  * addresses as necessary.
  */