Add ARM_MUSCA_A1 target

This commit adds ARM_MUSCA_A1 Cortex-M33 based target with 5006 ID.

Signed-off-by: Gabor Kertesz <gabor.kertesz@arm.com>

Author: gaborkertesz

mbed_lstools/platform_database.py

@@ -263,6 +263,7 @@
         u'5002': u'ARM_BEETLE_SOC',
         u'5003': u'ARM_MPS2_M0P',
         u'5005': u'ARM_MPS2_M0DS',
+        u'5006': u'ARM_MUSCA_A1',
         u'5007': u'ARM_MPS2_M1',
         u'5009': u'ARM_MPS2_M3',
         u'5011': u'ARM_MPS2_M4',