Update Musca-B1 platform path and add Musca-B1 SE

Original Musca-B1 platform was moved to musca_b1/sse_200 directory, and
Musca-B1 Secure Enclave platform was added into musca_b1/secure_enclave
directory.

Change-Id: Ie0697201416918a5bd4adf3e5080f9986769e016
Signed-off-by: Mark Horvath <mark.horvath@arm.com>
3 files changed