arm-soc: exynos: replace open coded VA->PA conversions

maillist inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8KNA9
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git/commit/?h=arm-kaslr-latest&id=6b12f315331362a8ec9e8fe3f97d9ae09e43fd28



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This replaces a couple of open coded calculations to obtain the
physical address of a far symbol with calls to the new adr_l etc
macros.

Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Felix Fu <fuzhen5@huawei.com>