libc: newlib: fix RAM config names for ARC

The RAM config symbols need to be updated as they were named by the
commit:
	1a1f7fd arc: make SRAM/DCCM values configurable

Change-Id: Ieeb06de2f77b4c9e10a0bc32d8318834ce150f5e
Signed-off-by: Bogdan Davidoaia <bogdan.m.davidoaia@intel.com>
1 file changed