BCM-0bb4-0306: Update to Cypress license in WHENCE

Signed-off-by: Kaihsiu Chen <KaiHsiu_Chen@htc.com>
Signed-off-by: Chi-Hsien Lin <chi-hsien.lin@cypress.com>
Signed-off-by: Josh Boyer <jwboyer@kernel.org>

WHENCE

@@ -12,7 +12,7 @@ Driver: BCM-0bb4-0306 Cypress Bluetooth firmware for HTC Vive
 
 File: brcm/BCM-0bb4-0306.hcd
 
-Licence: Redistributable. See LICENCE.broadcom_bcm43xx for details.
+Licence: Redistributable. See LICENCE.cypress for details.
 
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