ARM: rename some generic routines

ARM: rename some generic routines

Rename some (mostly) generic ARM functions:

    armv4_5_arch_state()       --> arm_arch_state()
    armv4_5_get_gdb_reg_list() --> arm_get_gdb_reg_list()
    armv4_5_init_arch_info()   --> arm_init_arch_info()

Cores using the microcontroller profile may want a different
arch_state() routine though.

(Also fix strange indentation in arm_arch_state: use tabs only!
And update a call to it, removing assignment-in-conditional.)

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>