fsogsmd: atcall: don't reenter call synchronization method
fsogsmd: atcall: don't reenter call synchronization method

slyon/debian-fso-deviced,slyon/debian-fso-deviced,slyon/debian-fso-usaged,slyon/debian-libfsoframework,slyon/debian-fso-usaged,slyon/debian-libfsoframework