ext: hal: nrfx: Import soc/nrfx_coredep.h from nrfx 1.3.1
ext: hal: nrfx: Import soc/nrfx_coredep.h from nrfx 1.3.1

This is a follow-up to commit b45fcc6b9e08ea2216ba5ef186b7336e82d5462c.
The nrfx import is complemented with the file containing
a core-dependent delay function. The intention is to allow it
to be used in a custom k_busy_wait() implementation.

Origin: nrfx
License: BSD 3-Clause
URL: https://github.com/NordicSemiconductor/nrfx/tree/v1.3.1
commit: d4ebe15f58de1442e3eed93b40d13930e7785903
Purpose: Provide peripheral drivers for Nordic SoCs
Maintained-by: External

Signed-off-by: Andrzej Głąbek <6788b8d556a8a447102338fc996c42180ecff44e@nordicsemi.no>

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