flash/nor/cfi: fix CamelCase symbols in cfi_spansion_pri_ext

flash/nor/cfi: fix CamelCase symbols in cfi_spansion_pri_ext

The struct cfi_spansion_pri_ext has few symbols in CamelCase.
Change all them accordingly to OpenOCD coding style.
Patch created automatically with the script below:

%<---%<---%<---%<---%<---%<---%<---%<---%<---%<---%<---%<---%<---
(cat << EOF
VppMin          vpp_min
VppMax          vpp_max
TopBottom       top_bottom
TmpBlkUnprotect tmp_blk_unprotected
SimultaneousOps simultaneous_ops
SiliconRevision silicon_revision
PageMode        page_mode
EraseSuspend    erase_suspend
BurstMode       burst_mode
BlkProtUnprot   blk_prot_unprot
BlkProt         blk_prot
EOF
) | while read a b; do
    sed -i "s/$a/$b/g" src/flash/nor/*cfi*
done
%<---%<---%<---%<---%<---%<---%<---%<---%<---%<---%<---%<---%<---

Change-Id: I135331539ca9aa84765fdffc51c87a07a46ee77a
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: http://openocd.zylin.com/6298
Tested-by: jenkins