build_wl18xx: add protection in case KERNEL_VARIANT is not set
authorEyal Reizer <eyalr@ti.com>
Thu, 12 Mar 2015 07:47:13 +0000 (09:47 +0200)
committerEyal Reizer <eyalr@ti.com>
Thu, 12 Mar 2015 07:47:13 +0000 (09:47 +0200)
KERNEL_VARIANT is a new environment variable that users that
already had their setup-env may not have it defined.
Avoid failure in applying driver patches in case it is not set.

Signed-off-by: Eyal Reizer <eyalr@ti.com>

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