regmap: cache: Fix num_reg_defaults computation from reg_defaults_raw
In 3245d460 (regmap: cache: Fall back to register by register read for cache defaults) non-readable registers are skipped when initializing reg_defaults, but are still included in num_reg_defaults. So there can be uninitialized entries at the end of reg_defaults, which can cause problems when the register cache initializes from the full array. Fixed it by excluding non-readable registers from the count as well. Signed-off-by: NMaarten ter Huurne <maarten@treewalker.org> Signed-off-by: NMark Brown <broonie@kernel.org>
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