Cavium CNN55XX: fix broken default Kconfig entry

Every developer always thinks that _their_ code is so special and
magical that it should be enabled by default.

And most of them are completely and utterly wrong.  That's definitely
the case when you write a specialty driver for a very unsual "security
processor". It does *not* get to mark itself as "default m".

If you solve world hunger, and make a driver that cures people of
cancer, by all means enable it by default.  But afaik, the Cavium
CNN55XX does neither.
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/crypto/cavium/nitrox/Kconfig

@@ -12,7 +12,6 @@ config CRYPTO_DEV_NITROX_CNN55XX
 	tristate "Support for Cavium CNN55XX driver"
 	depends on PCI_MSI && 64BIT
 	select CRYPTO_DEV_NITROX
-	default m
 	help
 	  Support for Cavium NITROX family CNN55XX driver
 	  for accelerating crypto workloads.