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This patch makes use of the new aw_fel_readl_n() function to output
the first four 32-bit values (SID key) from an SoC-specific address.
The corresponding e-fuses may not necessarily start at the SID
"base" address, e.g. on H3/A83T they are at <base+0x200>.

Note: SoC support is currently incomplete. In particular, reading
the SID on A31(s) is unsupported. Accessing it there is complicated
by the fact that Allwinner moved this information from the SoC into
the PMIC/AXP221.
Signed-off-by: Bernhard Nortmann <bernhard.nortmann@web.de>