M33: Disable DSP extension in ARCH_FLAGS

Without +nodsp, GCC's -mcpu=cortex-m33 enables DSP by default and
auto-vectorizes poly_ntt into smlabb, which faults under QEMU's
mps3-an524 cortex-m33.

Signed-off-by: Matthias J. Kannwischer <matthias@zerorisc.com>

Author: mkannwischer

test/baremetal/platform/m33-an524/platform.mk

@@ -36,7 +36,7 @@ CFLAGS += \
 	-DCMDLINE_BASE_ADDR=0x20007000
 
 ARCH_FLAGS += \
-	-mcpu=cortex-m33 \
+	-mcpu=cortex-m33+nodsp \
 	-mthumb \
 	-mfloat-abi=soft