Revert "Update target architecture and FPU settings for ARM toolchain"

This reverts commit cc50788acd, restoring
the soft-float toolchain defaults on dev. The hard-float work continues
on the dev-hard-float branch.

build-toolchain.sh

@@ -18,14 +18,9 @@ source "$(dirname "$0")/versions.sh"
 # Основные параметры тулчейна
 # ==================================================================
 TARGET="arm-uclinuxfdpiceabi"
-SUBARCH="armv7e-m"
+SUBARCH="armv7-m"
 SUBMODE="thumb"
 
-# Cortex-M7 (i.MX RT1050) с аппаратным FPU (VFPv5, двойная точность)
-TARGET_CPU="cortex-m7"
-TARGET_FPU="fpv5-d16"
-TARGET_FLOAT_ABI="hard"
-
 TOP="$(pwd)"
 CONFIGS_DIR="${TOP}/config"
 
@@ -41,7 +36,7 @@ KERNEL_SYSROOT_USR_DIR="${KERNEL_SYSROOT_DIR}/usr"
 KERNEL_SYSROOT_USR_INCLUDES_DIR="${KERNEL_SYSROOT_USR_DIR}/include"
 
 CFLAGS_TOOLSET='-O2'
-CFLAGS_TARGET="-Os -mthumb -mcpu=${TARGET_CPU} -mfpu=${TARGET_FPU} -mfloat-abi=${TARGET_FLOAT_ABI}"
+CFLAGS_TARGET='-Os -mthumb'
 
 export CFLAGS=$CFLAGS_TOOLSET
 export CFLAGS_FOR_TARGET=$CFLAGS_TARGET
@@ -114,9 +109,7 @@ mkdir -p "${BUILD_DIR}/gcc1" && cd "${BUILD_DIR}/gcc1"
 "${SRC_GCC}/configure" \
     --target="${TARGET}" \
     --prefix="${INSTALL_DIR}" \
-    --with-cpu="${TARGET_CPU}" \
-    --with-fpu="${TARGET_FPU}" \
-    --with-float="${TARGET_FLOAT_ABI}" \
+    --with-arch="${SUBARCH}" \
     --with-mode="${SUBMODE}" \
     --without-headers \
     --with-newlib \
@@ -193,9 +186,7 @@ mkdir -p "${BUILD_DIR}/gcc2" && cd "${BUILD_DIR}/gcc2"
     --target="${TARGET}" \
     --prefix="${INSTALL_DIR}" \
     --with-sysroot="${KERNEL_SYSROOT_DIR}" \
-    --with-cpu="${TARGET_CPU}" \
-    --with-fpu="${TARGET_FPU}" \
-    --with-float="${TARGET_FLOAT_ABI}" \
+    --with-arch="${SUBARCH}" \
     --with-mode="${SUBMODE}" \
     --enable-languages=c,c++ \
     --enable-threads=posix \