efi/libstub: Correct comment typos

Fix a couple typos in comments.
Signed-off-by: Joe Perches <joe@perches.com>
Link: https://lore.kernel.org/r/ec53e67b3ac928922807db3cb1585e911971dadc.1588273612.git.joe@perches.comSigned-off-by: Ard Biesheuvel <ardb@kernel.org>

drivers/firmware/efi/libstub/pci.c

@@ -69,7 +69,7 @@ void efi_pci_disable_bridge_busmaster(void)
 		 * access to the framebuffer. Drivers for true PCIe graphics
 		 * controllers that are behind a PCIe root port do not use
 		 * DMA to implement the GOP framebuffer anyway [although they
-		 * may use it in their implentation of Gop->Blt()], and so
+		 * may use it in their implementation of Gop->Blt()], and so
 		 * disabling DMA in the PCI bridge should not interfere with
 		 * normal operation of the device.
 		 */

drivers/firmware/efi/libstub/relocate.c

@@ -140,7 +140,7 @@ efi_status_t efi_relocate_kernel(unsigned long *image_addr,
 	 * The EFI firmware loader could have placed the kernel image
 	 * anywhere in memory, but the kernel has restrictions on the
 	 * max physical address it can run at.  Some architectures
-	 * also have a prefered address, so first try to relocate
+	 * also have a preferred address, so first try to relocate
 	 * to the preferred address.  If that fails, allocate as low
 	 * as possible while respecting the required alignment.
 	 */