Fix typo in gitignore

Signed-off-by: Rusty Lynch <rusty.lynch@intel.com>

Author: rustylynch

.gitignore

@@ -1,7 +1,7 @@
 hypervisor/build/
 hypervisor/bsp/uefi/include/bsp/version.h
 hypervisor/bsp/sbl/include/bsp/version.h
-devicemdodel/build/
+devicemodel/build/
 devicemodel/include/version.h
 doc/doxygen
 doc/_build