x86/boot: Fix boot regression caused by bootparam sanitizing
commit a90118c4 ("x86/boot: Save fields explicitly, zero out everything else") had two errors: * It preserved boot_params.acpi_rsdp_addr, and * It failed to preserve boot_params.hdr Therefore, zero out acpi_rsdp_addr, and preserve hdr. Fixes: a90118c4 ("x86/boot: Save fields explicitly, zero out everything else") Reported-by: NNeil MacLeod <neil@nmacleod.com> Suggested-by: NThomas Gleixner <tglx@linutronix.de> Signed-off-by: NJohn Hubbard <jhubbard@nvidia.com> Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Tested-by: NNeil MacLeod <neil@nmacleod.com> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20190821192513.20126-1-jhubbard@nvidia.com
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