arm64: dts: ti: k3-*: Fix whitespace around flash@0 nodes

The OSPI flash nodes are missing a space before the opening brace. Fix
that.

Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Apurva <Nandan&lt;a-nandan@ti.com>
Link: https://lore.kernel.org/r/20220217181025.1815118-1-p.yadav@ti.com