qemu: fix iotlb_to_section() for different AddressSpace

qemu: fix iotlb_to_section() for different AddressSpace

Backport upstream commit 854cd16e318e ("accel/tcg: Fix iotlb_to_section()
for different AddressSpace") to qemu 10.2.0.

The bug causes incorrect memory load/store when CPU access goes through
an IOMMUMemoryRegion that returns a different target AddressSpace, and the
fix replaces the section_index lookup with a direct MemoryRegionSection
pointer stored in CPUTLBEntryFull.

Note that the fix primarily targets ARM/RISC-V, but since it eliminates
iotlb_to_section() and performs the lookup based on CPUTLBEntryFull,
it may also help address some currently observed QEMU boot issues
on x86, e.g. the https://bugzilla.yoctoproject.org/show_bug.cgi?id=16259.

AI-Generated: kiro-cli

Signed-off-by: Quan Sun <Quan.Sun@windriver.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>