Add ipmi OEM handler to get the BMC mode

The response can indicate one of the BMC mode
below
0 -> Non Bare Metal Mode
1 -> Bare Metal Mode
2 -> Bare Metal Cleaning Mode

The Bare Metal Cleaning Mode is not
yet supported

Tested:

Response in BM Mode

ipmitool raw 0x2e 0x32 0x79 0x2b 0x00 0x10
79 2b 00 14 01

Response in  Non-BM Mode

ipmitool raw 0x2e 0x32 0x79 0x2b 0x00 0x10
79 2b 00 14 00

Signed-off-by: Nikhil Namjoshi <nikhilnamjoshi@google.com>
Change-Id: I34474fd04f9aed35bd71725805ed52a5df8ab8c9
diff --git a/meson_options.txt b/meson_options.txt
index 45af3e9..a91d641 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -1,2 +1,3 @@
 option('tests', type: 'feature', description: 'Build tests')
 option('static-bifurcation', type: 'string', value: '/usr/share/google-ipmi-sys/bifurcation.json', description: 'Path to Static Bifurcation Json config')
+option('bare_metal', type: 'boolean', value: false, description: 'Bare Metal Mode Flag')