configs/snps_archs38_hsdk_defconfig: use hard-float

Hard-float support is pretty stable, so make that default for HSDK
boards.

The hard-float setting is a bit convulated since current ARC gcc lacks
--with-fpu - so this is done with BR2_TARGET_OPTIMIZATION

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
[yann.morin.1998@free.fr: split off into its own commit]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
1 file changed