arm: spear13xx: Fix dmas cells

arm: spear13xx: Fix dmas cells

The "dmas" cells for the designware DMA controller need to have only 3
properties apart from the phandle: request line, src master and
destination master. But the commit 6e8887f60f60 updated it incorrectly
while moving from platform code to DT. Fix it.

Cc: [email protected] # v3.10+
Fixes: 6e8887f60f60 ("ARM: SPEAr13xx: Pass generic DW DMAC platform data from DT")
Reported-by: Arnd Bergmann <[email protected]>
Signed-off-by: Viresh Kumar <[email protected]>
Signed-off-by: Olof Johansson <[email protected]>