* config/arm/tm-arm.h (TARGET_DOUBLE_FORMAT): Define to use
floatformat_ieee_double_littlebyte_bigword for little endian
target byte order.
* utils.c (floatformat_to_doublest): Create local preswapped
copy of input for floatformat_littlebyte_bigword formats.
(get_field, put_field): Treat floatformat_littlebyte_bigword
the same as floatformat_little.
(floatformat_from_doublest): Postswap output words for
the floatformat_littlebyte_bigwords format.