[oem-cmd]: Support for Get/Set security modes

Command support for Get & Set Security modes are added. These
modes are used to limit the host interfaces IPMI command
execution. Based on the mode commands are fully blocked or
filtered or always allowed.

Tested:
1. ipmitool raw 0x30 0xB3  --> lists out Restriction & SecurityMode
2. ipmitool raw 0x30 0xB4 <newMode> --> updates RestrictionMode to
new value successfully
3. Verified improper values for set security mode.

Change-Id: I1f5f4ae53581a0f5da1684450853037b5bd39fea
Signed-off-by: Richard Marian Thomaiyar <richard.marian.thomaiyar@linux.intel.com>
diff --git a/include/oemcommands.hpp b/include/oemcommands.hpp
index 870a136..6852aa9 100644
--- a/include/oemcommands.hpp
+++ b/include/oemcommands.hpp
@@ -54,6 +54,8 @@
     cmdGetLEDStatus = 0xB0,
     cmdControlBmcServices = 0xB1,
     cmdGetBmcServiceStatus = 0xB2,
+    cmdGetSecurityMode = 0xB3,
+    cmdSetSecurityMode = 0xB4,
     cmdMtmKeepAlive = 0xB5,
     cmdGetNmiStatus = 0xE5,
     cmdSetEfiBootOptions = 0xEA,