Docs: Clean up build instructions

Primarily to reduce redundancy and improve clarity.
Also fixed a few typos.
In the "example builds" section, introduced the build command with
just the mandatory parameters at first and then introduced the
important optional parameters.

Signed-off-by: Chris Brand <chris.brand@cypress.com>
Change-Id: Ib4d74c3abcc850c836480dfb1962af30625c3a77
1 file changed