staging: wilc1000: rename pstrCfgParamVal in struct cfg_param_attr

This patch renames a variable of struct cfg_param_val in struct
cfg_param_attr, pstrCfgParamVal to cfg_attr_info to avoid CamelCase
naming convention.

Signed-off-by: Tony Cho <tony.cho@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>