mvebu: drop dangling SPI flash comments and #ifdefs

Following commits abe66b1b5dec ("Convert CONFIG_ENV_SPI_* to Kconfig")
and 14453fbfadc2f ("Convert CONFIG_SF_DEFAULT_* to Kconfig") remove
dandling comment lines and empty #ifdef sections.

Cc: Patrick Delaunay <patrick.delaunay@st.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Reviewed-by: Stefan Roese <sr@denx.de>
Signed-off-by: Stefan Roese <sr@denx.de>
11 files changed