nb/intel: Fix some spelling mistakes in comments and strings

Change-Id: I4a8297397d878e38516c8df19dd311c7ef19ec06
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/17478
Tested-by: build bot (Jenkins)
Reviewed-by: Nico Huber <nico.h@gmx.de>
diff --git a/src/northbridge/intel/haswell/ram_calc.c b/src/northbridge/intel/haswell/ram_calc.c
index d51692c..d3e88f2 100644
--- a/src/northbridge/intel/haswell/ram_calc.c
+++ b/src/northbridge/intel/haswell/ram_calc.c
@@ -24,7 +24,7 @@
 {
 	/*
 	 * Base of TSEG is top of usable DRAM below 4GiB. The register has
-	 * 1 MiB alignement.
+	 * 1 MiB alignment.
 	 */
 	uintptr_t tom = pci_read_config32(PCI_DEV(0,0,0), TSEG);
 	return tom & ~((1 << 20) - 1);