Revert "wolfssl: use dynamic ABI_VERSION depending on the configuration and package...

Revert "wolfssl: use dynamic ABI_VERSION depending on the configuration and package version"

This fixes the build on MIPS BE like ath25 and ath79 target.
We get this error message when linking libwolfssl:
mips-openwrt-linux-musl/bin/ld: /home/hauke/openwrt/openwrt/staging_dir/target-mips_mips32_musl/usr/lib/libwolfssl.so: unknown type [0x7000002a] section `.MIPS.abiflags'
mips-openwrt-linux-musl/bin/ld: /home/hauke/openwrt/openwrt/staging_dir/target-mips_mips32_musl/usr/lib/libwolfssl.so: unknown type [0x7000002a] section `.MIPS.abiflags'
mips-openwrt-linux-musl/bin/ld: skipping incompatible /home/hauke/openwrt/openwrt/staging_dir/target-mips_mips32_musl/usr/lib/libwolfssl.so when searching for -lwolfssl
mips-openwrt-linux-musl/bin/ld: cannot find -lwolfssl
collect2: error: ld returned 1 exit status

This reverts commit 2591c83b3406c16d3c1cd2dc7fa59c3c1b901d3c.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>