Documentation: Fix formatting

Fix formatting and missing close block quotes in nri_registers.md

Change-Id: I5fa0136f4d7f05737a0d53ff9da7d2c77b22d675
Signed-off-by: Tom Hiller <thrilleratplay@gmail.com>
Reviewed-on: https://review.coreboot.org/28327
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
diff --git a/Documentation/northbridge/intel/sandybridge/nri_registers.md b/Documentation/northbridge/intel/sandybridge/nri_registers.md
index 6249560..d5857ec 100644
--- a/Documentation/northbridge/intel/sandybridge/nri_registers.md
+++ b/Documentation/northbridge/intel/sandybridge/nri_registers.md
@@ -2138,7 +2138,7 @@
 |        0:7|                Selected multiplier: 100Mhz [7,12], 133Mhz [3,19] |
 +-----------+------------------------------------------------------------------+
 |         8 | - 1: 100Mhz reference clock                                      |
-|           | - 0: 133Mhz reference clock (Ivy Bridge only)                     |
+|           | - 0: 133Mhz reference clock (Ivy Bridge only)                    |
 +-----------+------------------------------------------------------------------+
 |        31 |                                                         PLL busy |
 +-----------+------------------------------------------------------------------+
@@ -2172,3 +2172,4 @@
 +===========+==================================================================+
 |         8 |                                                      Force RCOMP |
 +-----------+------------------------------------------------------------------+
+```