Build: Restructure Musca-B1 folders

Original musca_b1 platform is renamed to musca_b1/sse_200, and
musca_b1_secure_enclave is renamed to musca_b1/secure_enclave.

Change-Id: If05f1878cff3808ec95e207abe4a0a433998523c
Signed-off-by: Gabor Abonyi <gabor.abonyi@arm.com>
Signed-off-by: Mark Horvath <mark.horvath@arm.com>
134 files changed