markdownlint: fix all warnings

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I0b596901eaa0eb80edfba31007c7d106797127f0
diff --git a/docs/mrw-xml-requirements.md b/docs/mrw-xml-requirements.md
index 09514b9..37bd143 100644
--- a/docs/mrw-xml-requirements.md
+++ b/docs/mrw-xml-requirements.md
@@ -16,10 +16,10 @@
 
 To specify a target in the MRW should be in the inventory:
 
-- Set the FRU_NAME attribute of that target.
+- Set the `FRU_NAME` attribute of that target.
 
 **Note**: The BMC and cores will be automatically added without the need to set
-FRU_NAME.
+`FRU_NAME`.
 
 ## BMC Device Tree
 
@@ -37,11 +37,11 @@
 
 ### System Level Attributes
 
-##### SYSTEM_NAME
+#### `SYSTEM_NAME`
 
 The name of the system as the firmware would know it.
 
-##### MANUFACTURER
+#### MANUFACTURER
 
 The system manufacturer.
 
@@ -68,12 +68,12 @@
 connected to an ethernet slave unit. Additionally, the following attributes may
 need to be set.
 
-##### NCSI_MODE
+#### `NCSI_MODE`
 
 This attribute in the ethernet master unit can be set to 1 if the link uses
 NCSI. The default is 0.
 
-##### USE_HW_CHECKSUM
+#### `USE_HW_CHECKSUM`
 
 This attribute in the ethernet master unit can be set to 1 if the MAC has
 hardware checksum enabled, or 0 if not enabled. The default is 1.
@@ -90,7 +90,7 @@
 their GPIO master endpoints. The instance name in the MRW is the name of its
 node in the device tree.
 
-##### ON_STATE
+#### `ON_STATE`
 
 Set to the logic value required to activate the LED - either 0 or 1. The default
 is 0.
@@ -100,18 +100,18 @@
 I2C devices are enabled by connecting the I2C master units in the BMC to the I2C
 slave units on the devices.
 
-##### I2C_ADDRESS
+#### `I2C_ADDRESS`
 
 The 8 bit hexadecimal I2C address should be set in the slave unit of the end
 device.
 
-##### BMC_DT_COMPATIBLE
+#### `BMC_DT_COMPATIBLE`
 
 When creating a new XML device model, this attribute should be used to specify
 which device driver the kernel will use to access the device. For example,
 `ti,423` or `bosch,bmp280`. For existing parts, this should already be set.
 
-##### BMC_DT_ATTR_NAMES
+#### `BMC_DT_ATTR_NAMES`
 
 This attribute is also only required when creating a new XML representation of
 an I2C device. It specifies which other attributes of the device should be