[xen staging-4.17] x86/p2m-pt: fix off by one in entry check assert

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commit 091466ba55d1e2e75738f751818ace2e3ed08ccf
Author:     Roger Pau Monné <roger.pau@xxxxxxxxxx>
AuthorDate: Fri Feb 2 08:04:33 2024 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Fri Feb 2 08:04:33 2024 +0100

    x86/p2m-pt: fix off by one in entry check assert
    
    The MMIO RO rangeset overlap check is bogus: the rangeset is inclusive so 
the
    passed end mfn should be the last mfn to be mapped (not last + 1).
    
    Fixes: 6fa1755644d0 ('amd/npt/shadow: replace assert that prevents creating 
2M/1G MMIO entries')
    Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
    Reviewed-by: George Dunlap <george.dunlap@xxxxxxxxx>
    master commit: 610775d0dd61c1bd2f4720c755986098e6a5bafd
    master date: 2024-01-25 16:09:04 +0100
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