staging: omap-thermal: remove from register map soc and mode on OMAP5

On OMAP54xx ES2.0 there is no single read and only one mode: continuous
mode. For this reason, there is no point in defining register fields
for these operations.

Signed-off-by: Eduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>