crypto: bcm - Delete redundant variable definition

The variable "i" is redundant to be assigned a value
of zero,because it's assigned in the for loop, so remove
redundant one here.

Signed-off-by: Shengju Zhang <zhangshengju@cmss.chinamobile.com>
Signed-off-by: Tang Bin <tangbin@cmss.chinamobile.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>