Documentation: dt: reset: Revise typos in TI syscon reset example

Fix couple of typos in the example given in the TI syscon reset
binding. The ti,reset-bits used for DSP0 are corrected to match
the values that will be used in the actual DT node.

Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>