treewide: surround Kconfig file paths with double quotes ...

Based on Linux commit 8636a1f

This will be needed when you sync Kconfig with Linux 5.0 or later.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

treewide: remove blank texts ...

These should be fixed before the Kconfig resync because Linux 4.16 or
later warns it.

Refer to Linux commit 1b9eda2e4892 ("kconfig: Warn if help text is
blank").

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

crypto: add i.MX6 CAAM support ...

Add the i.MX6 crypto core CAAM with support for the random number
generator.

The core itself works with jobrings in which descriptors can be
queued/dequeued for processing. Depending on descriptor type
the CAAM unit then either produces random numbers or decrypts/encrypts
data.

The code is based on the Linux v4.1 driver of the same name
without all the crypto/hashing components.

Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>